| Compact Pulsed Power and High Power Microwave Devices |
01 SEP 2003 |
32 pages |
| Authors:
M . Kristiansen; J. C. Dickens; S. I. Shkuratov; TEXAS TECH UNIV LUBBOCK DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
 | This research final report covers activities conducted by Texas Tech University from June 1, 2000 to May 31, 2003 on Grant No. F46620-00-1-0221. We investigated the fundamental basic materials limitations to the design of compact, expendable (i.e. one-time use), pulsed power and microwave sources which can be munitions launched, air dropped, towed, etc. These devices are driven by explosives. The main devices of interest include ferromagnetic generators (FMGs), piezoelectric generators ... |
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| A Two-Stage Light Gas Gun for the Study of High Speed Impact in Propellants |
JAN 2001 |
30 pages |
| Authors:
Con Doolan; AERONAUTICAL AND MARITIME RESEARCH LAB SALISBURY (AUSTRALIA) WEAPONS SYSTEMS DIV
|
| This report describes a proposed two-stage light gas gun for the investigation of high speed impact in solid rocket propellants. Such a facility would provide valuable, quantitative information on the IM response of propellants for the ADF. A description of the operating principles and anticipated design is followed by a performance prediction using a numerical model. A quasi-one-dimensional computational fluid dynamics code was utilized to simulate the interaction of the ... |
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| Fundamental Limits to Compact, Expendable Pulsed Power and Microwave Sources |
14 SEP 2000 |
52 pages |
| Authors:
M. Kristiansen; J. Dickens; S. Shkuratov; TEXAS TECH UNIV LUBBOCK PULSED POWER LAB
|
| This final report covers activities conducted by Texas Tech University from June 15, 1997 to June 14, 2000. We are investigating the fundamental basic materials limitations to the design of compact, expendable (i. e. one-time use), pulsed power and microwave sources which can be munitions launched, air dropped, towed, etc. These devices will ultimately be driven by explosives but the initial laboratory work was done with ... |
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| The Influence of Row Dispersers on 3O-mm Gun-Type Annular Jets -- XM46 Combustion and Flash X-ray Photography of Aqueous NaI Solutions |
APR 95 |
34 pages |
| Authors:
Avi Birk; Michael McQuaid; Matthew Gross; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| This report summarizes an experimental study to characterize the influence of the injector exit configuration on the flow and combustion dynamics of regeneratively injected XM46. In particular, it identifies differences in the spray structure and combustion dynamics produced when a 600 wedge flow disperser is attached to a basic injector configuration. The study consisted of two parts. The first part involved characterizing the structure of aqueous sodium iodine (NaI) sprays ... |
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| Development of a Transient Internal Probe Diagnostic |
16 DEC 94 |
42 pages |
| Authors:
Thomas R. Jarboe; Arthur T. Mattick; UNIV OF WASHINGTON SEATTLE AEROSPACE AND ENERGETICS RESEARCH PROGRAM
|
| A research effort was carried out to develop and test key components of the transient internal probe, a diagnostic tool for measuring internal magnetic fields in a plasma. A gasdynamic sabot separation method was developed for discarding the sabot upstream of the plasma. Separation is effected in a vented 50-caliber gun barrel, and the sabot is deflected upstream of the plasma, reliably removing the sabot without disrupting the probe trajectory. ... |
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| Transient Internal Probe |
15 DEC 93 |
58 pages |
| Authors:
Thomas R. Jarboe; Arthur T. Mattick; UNIV OF WASHINGTON SEATTLE AEROSPACE AND ENERGETICS RESEARCH PROGRAM
|
| The Transient Internal Probe (TIP) diagnostic is a novel method for probing the interior of hot magnetic fusion plasmas that are inaccessible with ordinary stationary probes. A small probe of magneto-optic (Verdet) material is fired through a plasma at speeds of several km/sec, illuminated by a laser beam. The beam's polarization is rotated in the probe by the local magnetic field and retroreflection back to a polarimetry detector allows determination ... |
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| Detonation Wave Curvature, Corner Turning, and Unreacted Hugoniot of PBXN-111 |
19 MAR 92 |
115 pages |
| Authors:
J. W. Forbes; E. R. Lemar; G. T. Sutherland; R. N. Baker; NAVAL SURFACE WARFARE CENTER DAHLGREN DIV VA
|
| This study was undertaken to develop a date base on the detonation properties of PBXN-111 (formerly PBXW-115)and to improve our understanding of its divergent flow properties. This data base can be used to test curved wave front detonation theories and two-dimensional hydrodynamic flow detonation models which take into account the initiation and the growth of reactions and multiple energy release rates. A high-speed streak camera was used to measure the ... |
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| Dynamic Material Properties of Moist Sand |
MAR 92 |
37 pages |
| Authors:
F. Y. Sorrell; T-m Kuo; NORTH CAROLINA STATE UNIV AT RALEIGH
|
| The dynamic response of moist sand was measured under shock loading conditions similar to those produced by the ground shock loading from a conventional weapon. The loading was produced by a large bore (15 cm) light gas gun which produced shock stress levels of 1 to 3 KBar. The speed of propagation of the shock wave and the stress levels in the soil were measured directly by the use of ... |
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| Transient Internal Probe Diagnostic |
12 DEC 91 |
44 pages |
| Authors:
Thomas R. Jarboe; Gregory G. Spanjers; Walter H. Christiansen; Glen A. Wurden; Bradford L. Wright; UNIV OF WASHINGTON SEATTLE AEROSPACE AND ENERGETICS RESEARCH PROGRAM
|
| The Transient Internal Probe (TIP) diagnostic is a novel method for probing the interior of hot magnetic fusion plasmas that are inaccessible with ordinary stationary probes, by limiting the time that the probe is in the plasma, and by encasing the probe in a diamond cladding. In the TIP scheme, a probe is fired through a hot plasma at velocities in excess of 2.5 km/s, and makes direct, local measurements ... |
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| Behavior of Segmented Rods during Penetration |
JUL 90 |
40 pages |
| Authors:
G. E. Hauver; A. Melani; ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Flash radiographic observations and measurements were used to examine the behavior of small-scale segmented and unitary rods as they penetrated steel targets after impact at 1500 m/s. Penetration data were examined by an eroding- rod model which aided interpretations of behavior. Segmented rods of tungsten alloy always penetrated less than the equivalent unitary rod. Successive rod segments were found to contribute progressively less to the total penetration because of their ... |
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| Demonstration of Oblique Detonation Wave for Hypersonic Propulsion |
30 MAR 89 |
118 pages |
| Authors:
Takashi Nakamura; Michael J. Schuh; Donald S. Randall; Thomas J. Dahm; David T. Pratt; ASTRON RESEARCH AND ENGINEERING SUNNYVALE CA
|
| The Oblique Detonation Wave Engine (ODWE) offers a number of advantages over the Supersonic Combustor Ramjet (SCRAMJET) for hypersonic aeropropulsion. The objective of this program is to obtain data on the stability of the Oblique Detonation Wave (ODW) and to assess the applicability of the ODW to hypersonic propulsion. The program consists of the basic study of the ODW phenomenon and the design study of the test facility (Phase I), ... |
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| Evaluation of Internal Ballistic Capabilities of Wave Gun for Tactical Weapons Application |
01 OCT 1984 |
|
| Authors:
T. J. Dahm; ASTRON RESEARCH AND ENGINEERING MOUNTAIN VALLEY CA
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| Shock Ignition Sensitivity of Multiply-Shocked TNT |
JUL 1982 |
35 pages |
| Authors:
V. M. Boyle; D. L. Pilarski; ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The shock ignition sensitivity of pressed TNT was decreased by shocking it with a leading low pressure wave (.2 - 1.0 GPa) which was followed within several microseconds by one or two shock waves which gave a maximum pressure of 2.7 GPa. The velocity of the reaction products from the downstream free surface of the impacted TNT was used as a measure of relative reaction. A system is described for ... |
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| Explosive Driver Application Feasibility Study and Test for Use in the Hypervelocity Launch of High Density High L/D Projectiles |
FEB 1982 |
53 pages |
| Authors:
Evan Harris Walker; ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| A study of explosive drivers for use in short term experimental ballistics programs requiring hypervelocity launch capability for high density, high L/D projectiles has been carried out. The study focused on the problems associated with the application of explosive drivers as a possible simple expedient in ballistics programs requiring a small number of test shots. Since prior use of explosive drivers has not dealt with the launch of high density, ... |
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| Measurement Problems in High Velocity Impact Experiments |
SEP 1981 |
39 pages |
| Authors:
William Lawrence; ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Reverse-ballistic experiments have been performed at the Ballistic Research Laboratory using a light-gas gun to launch targets against stationary long-rod projectiles instrumented with foil type resistance strain gages. Signals from the strain gages are recorded, measured and analyzed to obtain information about the dynamic behavior of the projectile as it penetrates the target. Signals from the strain gages are commonly divided so that part of the signal may be displayed ... |
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| Rate of Penetration Measurements. |
DEC 1979 |
|
| Authors:
Paul H. Netherwood Jr; ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
|
 | Records of the motion of the penetrator target interface have been obtained for impacts of steel long-rod penetrators against rolled homogeneous armor targets. Insulated wires inserted in drilled holes in the targets are used as switches which close when the penetrator contacts the wire. The results show a high penetration velocity immediately after impact, a rapid decrease to a nearly constant velocity, then an apparent velocity increase when the rear ... |
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| Development and Testing of a Two-Stage Hybrid Launcher. |
31 OCT 1979 |
|
| Authors:
K. E. Suchsland; J. D. Watson; T. J. Dahm; J. L. Hull; ACUREX CORP MOUNTAIN VIEW CA
|
| This report summarizes the development to date of a 1/4-scale launcher designed to launch a 7.2-kg model at a 6.1 km/sec in full scale. The hybrid launcher design principles are reviewed. Projected performance shows launch masses within soft-launch constraints that are 3 to 4 times larger than possible by using a conventional two-stage launcher. The results of component development tests leading to the subscale demonstration are presented. The importance of ... |
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| Riot Control Weapon. |
06 FEB 1979 |
|
| Authors:
Aaron C. Beauchamp; DEPARTMENT OF THE ARMY WASHINGTON DC
|
| A riot control weapon using air pressure to eject inexpensive projectiles from its muzzle. Its velocity, range and impact is adjustable by an air regulator between the compressed air supply and the trigger actuated air valve to suit the needs of the situation. The weapon is a rapid fire rifle, wherein the regulator is adapted to provide instantaneous change to the pressure in the barrel of the rifle while the ... |
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| Two Stage Telescoped Launcher. |
02 AUG 1977 |
|
| Authors:
William P. Wohlford; DEPARTMENT OF THE ARMY WASHINGTON D C
|
| A two stage telescoped launcher wherein propellant compresses a gas which in turn ejects a projectile from a gun launch tube. The two stages are telescoped to shorten the gun and to permit breech loading of the projectile. (Author) |
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| In Situ Stress Gauge Calibration. |
MAY 1977 |
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| Authors:
K. Seifert; J. Shea; PHYSICS INTERNATIONAL CO SAN LEANDRO CALIF
|
| The accuracy of 'in situ' stress measurements is dependent upon the presence of strain within the active gauge element. In gauge records of dynamic stress fields, the onset of strain response of the gauge is not able to be defined. Development of a gauge that responds only to the applied pressure, independent of the strain field, is usable in that the deviance of a stress transducer from its calibration in ... |
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| A Superconducting Magnet Dewar Missile for Launching in Ballistic Ranges. |
MAR 1976 |
|
| Authors:
E. E. Erickson; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN
|
| One concept for magnetic guidance of projectiles in hypervelocity ballistic ranges is the use of a superconducting magnet within the projectile. The magnet must survive the large launch loads (250,000 g's) necessary to achieve test velocities (20,000 ft/sec). This report describes a conceptual design of a dewar which contains a superconducting magnet and its performance limitations. Thermal holding time for the preposed dewar would be in excess of 90 min. ... |
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| Bibliographical Analysis and Critique of the Studies of Sensitivity to Shock Waves of Condensed Secondary Explosives (Bibliographique et Critique des Etudes de Sensibilite a l'Onde de Choc des Explosifs Secondaires Condenses), |
04 FEB 1976 |
|
| Authors:
C. Fauquignon; Y. de Longueville; NAVAL INTELLIGENCE SUPPORT CENTER WASHINGTON D C TRANSLATION DIV
|
| An analysis is conducted of the many works which have been published on the sensitivity of explosives to shock waves. An attempt is made to bring out the relative influence of various chemical and physical parameters associated with the explosive as well as the need to characterize the impact by pressure and time span. A critical study of the notion of energy threshold concludes the report. |
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| Development of a 7-in. Air Gun for Use in Interior Ballistics Simulation |
OCT 1975 |
51 pages |
| Authors:
Michael G. Otten; HARRY DIAMOND LABS ADELPHI MD
|
| A 7-in. diameter, 98-ft-long air gun has been installed at the Harry Diamond Laboratories (HDL) for use in fuze testing. The air gun is bidirectionally interfaced to a timeshare computer that acts as the test controller and promptly records test data. Streak photographs taken of the simulated ballistic environment are reduced by a computer-controlled microdensitometer. The resulting digital data are further computer analyzed to provide velocity versus time and acceleration ... |
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| Impact Pulse Shaping |
JUN 1975 |
59 pages |
| Authors:
Irvin Pollin; HARRY DIAMOND LABS ADELPHI MD
|
| The Harry Diamond Laboratories 4- and 7-in. air guns are used to slowly accelerate projectiles and components contained therein to speeds up to 900 ft/sec. The impacts of these projectiles are designed to produce pulse shapes (projectile decelerations) that simulate the interior ballistic acceleration environments occurring in a real gun. The continuity, momentum, and energy conservation equations are applied to the impact testing of projectiles, and calculations obtained therefrom are ... |
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| Water Drop/Bow Shock Interactions. |
JUN 1975 |
|
| Authors:
John P. Barber ; Edward S. Grood; Henry R. Taylor; Alan K. Hopkins; DAYTON UNIV OHIO RESEARCH INST
|
| The interaction of water drops of diameters in the range of 20 to 200 micrometers with reentry vehicle bow shocks was investigated with a microscope/Q-spoiled laser camera system. A single stream of water drops was generated on the trajectory of a Mach 12 projectile launched from a light gas gun. The microscope/Q-spoiled laser camera was used to obtain high resolution photographs of the nose tip region of the projectile as ... |
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| Dynamic Properties of Rock Required for Prediction Calculations. |
NOV 1974 |
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| Authors:
C. F. Petersen; J. T. Rosenberg; STANFORD RESEARCH INST MENLO PARK CALIF
|
| Dynamic loading and unloading curves were measured to 29 kbar in wet and dry tuff from the Nevada Test Site, wet and dry sandstone from the Mixed Company site, and wet soil from the Essex site. The curves were obtained using multiple embedded gages that recorded particle velocity and/or stress histories at up to four different depths in gas gun impact experiments. The Fowles-William analysis method was used to generate ... |
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| Density and Temperature Distributions in Hypersonic Cone Wakes, |
AUG 1973 |
|
| Authors:
J. G. G. Dionne; L. Tardif; DEFENCE RESEARCH ESTABLISHMENT VALCARTIER (QUEBEC)
|
| This report presents mass density measurements performed in the wake of hypersonic cones in free flight using the electron beam fluorescence probe technique. The radial and axial mass density distributions were obtained in the wake of sharp nose cones with vertex angles of 44 deg and 20 deg launched at 15,500 fps in a nitrogen atmosphere at 10 torr. The corresponding temperature distributions were inferred from the density data by ... |
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| An Investigation of Strain Wave Propagation in Metallic Conical Rods |
JUN 1973 |
71 pages |
| Authors:
J. P. Billingsley; P. A. Evans; R. L. Nenninger; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFS TN
|
| Strain wave propation in metal cones with a compressive pulse applied at the base has been investigated experimentally and theoretically. This study was motivated by the need for design information for gun-launched models used in aerophysics research. The results are also directly applicable to the design of ordinary gun-launched munitions or to any other cases of impulsive loading on conical bars. The effect of the following parameters was considered: cone ... |
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| Gun-Driven Magnetic Flux Compression--Feasibility Study, |
SEP 1972 |
|
| Authors:
Michael J. Vrabel; Richard P. Leavitt; James C. Blackburn; Philip S. Brody; HARRY DIAMOND LABS WASHINGTON D C
|
| A series of preliminary experiments has demonstrated the feasibility of using a gun-launched projectile to produce magnetic flux compression. The projectile impacts and collapses a coil of triangular cross section into which a 60-kG seed field has been injected by a capacitor bank discharge. The seed field is compressed by a factor greater than 8 to achieve a peak field of 520 kG in a coil volume of 1 to ... |
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| Material Behavior in High Speed Impact |
15 JUL 1972 |
10 pages |
| Authors:
George E. Duvall; G. Richard Fowles; WASHINGTON STATE UNIV PULLMAN DEPT OF PHYSICS
|
| A gas gun facility was established for the purpose of studying effects of impact in solids. Research was conducted on the dynamic strength of several materials with the goal of relating macroscopic effects to atomic mechanisms. It was discovered that some crystals (lithium fluoride) that are relatively soft and plastic under usual conditions can support extremely large stress differences for short periods of time. Further, the observed strength cannot be ... |
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| Dynamic Tensile Failure in Rocks. |
11 MAR 1972 |
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| Authors:
Donald A. Shockey; Carl F. Petersen; Donald R. Curran; John T. Rosenberg; STANFORD RESEARCH INST MENLO PARK CALIF
|
| A simple homogeneous rock, Arkansas novaculite, was chosen for dynamic tensile failure studies. Experimental techniques for performing dynamic tensile tests on rocks were developed and used to provide meaningful measurements of dynamic tensile strength. A way to eliminate the occurrence of undesirable radial cracking of the specimen during testing was found; specimen recovery and fracture analysis methods were implemented. Novaculite specimens were characterized with respect to static and dynamic fracture ... |
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| Rock Disintegration by Pulsed Liquid Jets. |
JAN 1972 |
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| Authors:
William C. Cooley; Paul E. Brockert; TERRASPACE INC BETHESDA MD
|
| Experiments are reported on the breakage of granite, limestone and sandstone by pulsed water jets using a Voitsekhovsky-type cumulation nozzle with jet velocities up to 1800 m/sec, a jet diameter of 0.716 cm, and piston impact energies up to 65,000 Joules. Data on the specific energy for single pulse spall craters in the face of 30 cm cubic rock samples is plotted against the specific pressure (the ratio of jet ... |
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| Experimental and Analytic Performance of the Slingshot Pilot Facility, |
1972 |
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| Authors:
J. Librizzi; D. Landsberg; R. J. Cresci; M. H. Bloom; POLYTECHNIC INST OF BROOKLYN FARMINGDALE N Y
|
| An experimental and theoretical investigation leading to the development of an advanced aerodynamic test facility is presented. The basic concept involves the acceleration of an encapsulated slug of test gas over a fixed model to obtain a very high velocity, high Reynolds number environment without the use of a preprocessed test gas. A pilot configuration utilizes a light gas launcher to accelerate the gas capsule. |
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| Electrical Output of M371A1 Lucky Assemblies for Different Impact Angles, |
DEC 1971 |
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| Authors:
Philip S. Brody; James C. Blackburn; Harold S. Watkins; HARRY DIAMOND LABS WASHINGTON D C
|
| Laboratory measurements have been made to determine the energy output of piezoelectric 'Lucky' elements used in the M371A1 HEAT round under impact at different angles between 0 and 65 deg. Massive steel projectiles are accelerated by a light-gas gun to 700 ft/sec and impacted against fixed fuze spike assemblies (containing the Lucky) with the angle of impact being variable. The energy output from the Lucky into fixed resistor loads (which ... |
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| Measurements of Dynamic Properties of Materials. Volume 2. Experimental Methods and Techniques |
AUG 1971 |
76 pages |
| Authors:
Douglas R. Christman; William M. Isbell; Stephen G. Babcock; Allan R. McMillan; Sidney J. Green; GENERAL MOTORS TECHNICAL CENTER WARREN MI MATERIALS AND STRUCTURES LAB
|
| Experimental methods and techniques for studying the dynamic response of materials are discussed. Descriptions cover uniaxial and multiaxial stress testing at strain rates up to 1,000/sec, temperatures up to 4000C and heating rates up to 10,000C/sec; measurements of elastic constants as functions of temperature (up to 300C) and pressure (up to 10 kbars); flat-plate impact techniques for uniaxial strain testing at impact velocities up to 8 mm/microsec; hugoniot equation of ... |
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| A Brief Study of the Possibility of using Partial Similitudes to Estimate the Level of Impact Damage. |
JUL 1971 |
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| Authors:
Coleman duP. Donaldson; Brian H. Jones; AERONAUTICAL RESEARCH ASSOCIATES OF PRINCETON INC N J
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| Results are presented of a preliminary study to determine the possibility of using limited or partial similitudes to determine the general level of damage that results from high-speed particle impact. Experimental results are presented and compared for four separate types of impact which satisfy a certain partial similitude. The similarity of impact damage for these conditions is discussed for both simple and compound targets. (Author) |
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| Mass Transfer and Drag Effects on Turbulent Structure in a Hypersonic Wake. |
JUL 1971 |
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| Authors:
Karl M. Thomas; Bernadette L. Maguire; GENERAL ELECTRIC CO PHILADELPHIA PA RE-ENTRY AND ENVIRONMENTAL SYSTEMS DIV
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| A test facility/model combination has been developed and operated to obtain sufficiently high unit Reynolds numbers to achieve a range of flows which produce variations from completely laminar to fully developed turbulent body boundary layer on a 5 degree - 1/2 angle cone with a 3.85 inch diameter base. The state of the model boundary layer has been determined using thin film heat gages for a wide range of test ... |
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| High Pressure Shock Wave Attenuation. |
JUN 1971 |
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| Authors:
Allan R. McMillan; William M. Isbell; Arfon H. Jones; GENERAL MOTORS TECHNICAL CENTER WARREN MICH MATERIALS AND STRUCTURES LAB
|
| The attenuation of high pressure shock waves has been investigated. Highpurity copper, 6061-T6 aluminum, 6Al-4V and alpha phase titanium, an uranium alloy and two alloys of beryllium were examined experimentally at pressures as high as 3 megabars. Low pressure experiments were instrumented with a velocity laser interferometer. Intermediate pressures (to several hundred kilobars) were instrumented with manganin wire peizoresistive gages and high pressure measurements were made through observation of free ... |
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| The Effect of Projectile Strength on Crater Formation. |
FEB 1971 |
113 pages |
| Authors:
Nicholas C. Byrnside; Peter J. Torvik; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO
|
| The influence of projectile strength on cratering was investigated for projectiles of four aluminum alloys impacting semi-infinite aluminum targets over the velocity range of 1 km/sec to 5.0 km/sec. Final crater dimensions and peak shock pressure were selected as parameters for comparing the influence of projectile strength. The experimental results showed that crater diameters were not significantly influenced by varying projectile strength. The crater depths were found to vary appreciably ... |
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| A Preliminary Monte-Carlo Analysis of the Reflection of an Imploding Hemispherical Shock Wave Similar to that Generated in the UTIAS Implosion Driven Hypervelocity Launcher or Shock Tube, |
NOV 1970 |
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| Authors:
A. K. Macpherson; TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES
|
| The reflection of a hemispherical imploding shock wave in argon was studied in the region very close to the centre. Two aspects, which could not be studied by classical analysis near the centre, were the effect of a cold wall upon the reflection and multi-body collisional effects. The effect of the cold wall was examined using a Monte-Carlo technique and comparing the results obtained when the wall was treated as ... |
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| Ballistic-Range Technology. |
AUG 1970 |
513 pages |
| Authors:
Thomas N. Canning; Alvin Seiff; Carlton S. James; ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT PARIS (FRANCE)
|
| The report is a comprehensive treatment of the state-of-the-art of ballistic-range testing, written for graduates by members of the staffs of the Hypersonic Free-Flight Branch at NASA-Ames Research Center and the Aerophysics Division of the Defence Research Establishment of Canada. The capability and potential of ballistic ranges are not as widely appreciated as they deserve to be and the book aims to show the opportunities they afford for experimental research ... |
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| AN OPTIMIZATION OF STUDY OF THE UTIAS IMPLOSION-DRIVEN HYPERVELOCITY LAUNCHER MK II. |
APR 1970 |
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| Authors:
Robert F. Flagg; Gregory P. Mitchell; TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES
|
| A detailed study is presented of the optimization of the projectile velocity of the proposed UTIAS MK II Implosion-Driven, Hypervelocity Launcher. The projectile velocity was optimized with respect to four variables, namely explosive weight, initial loading pressure, hemispherical cavity size, and peak projectile acceleration or base pressure. The details of the dynamics of the waves which occur in the chamber and the dynamics of the projectile in the barrel were ... |
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| Hypervelocity Impact Damage in Cadmium Targets. |
MAR 1970 |
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| Authors:
Robert N. Teng; MCDONNELL DOUGLAS ASTRONAUTICS CO-WEST SANTA MONICA CA
|
| Quantitative information on hypervelocity impact dynamics was obtained from 30 shots. Cadmium spheres projected at a velocity of 25,000 fps impacted against multiplate targets. Instrumentation used during the test includes five channels of flash X rays, high-speed framing camera, model detectors, impact pressure probes, laser stress-wave sensors, and photostress analyzer. However, data from the pressure measurements and the stress-wave analysis are not included in this report. Some preliminary conclusions made ... |
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| A Gas Gun for Transonic Velocities. |
MAR 1970 |
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| Authors:
R. Plunkett; D. E. Godfrey; K. Yamaishi; P. Beynet; MINNESOTA UNIV MINNEAPOLIS DEPT OF AEROSPACE ENGINEERING AND MECHANICS
|
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| A SPECTROSCOPIC INVESTIGATION OF COMBUSTION-DRIVEN SPHERICAL IMPLOSION WAVES. |
SEP 1969 |
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| Authors:
D. E. Roberts; TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES
|
| A spectroscopic study has been made of imploding shock waves in a hemispherical chamber filled with an H2-O2-He mixture at high initial pressures. In particular, temperature measurements at the origin of the chamber were made. Specific attention was paid to the use of the device as a driver for the Implosion-Driven Hypervelocity Launcher. (Author) |
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| COMPRESSION OF POLYTROPIC GASES BY IMPULSIVE PISTON MOTION IN HYPERVELOCITY GUNS, GUN TUNNELS, AND REACTION HEATERS, |
AUG 1969 |
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| Authors:
Ray C. Makino; Viola Woodward; BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD
|
| Simple analytic solutions are obtained for the shock compression of polytropic gases in hypervelocity guns, gun tunnels, and reaction heaters, where the piston is given some finite energy impulsively and is constrained to move with a piecewise uniform velocity. Examples are given to show the variation of pressure, density, and temperature with the specific heat ratio of the gas and with the piston-to-gas mass ratio. (Author) |
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| SLINGSHOT - AN ADVANCED AERODYNAMIC TEST FACILITY. |
JUL 1969 |
|
| Authors:
M. H. Bloom; R. J. Cresci; G. Moretti; J. Librizzi; POLYTECHNIC INST OF BROOKLYN FARMINGDALE N Y DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS
|
| A conceptual view is presented of the SLINGSHOT method of mechanically setting fluids or other materials into motion with respect to models. In the special context of gas-dynamic testing, unpre-processed test gas is made available at high Reynolds numbers and high Mach numbers with fixed models. Performance in regimes now inaccessible with fixed models is theoretically possible; however, practical implementation may require significant effort. Exploratory experiments made with the simplest ... |
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| HYPERVELOCITY PERFORATION MECHANICS OF THIN METAL PLATES. |
JUL 1969 |
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| Authors:
William C. Turpin; Hallock F. Swift; Lewis A. Shiverdecker; Henry R. Taylor; Edward A. Strader; DAYTON UNIV OHIO
|
| An experimental investigation was conducted to examine hypervelocity perforation mechanics of thin aluminum and copper plates impacted at 5 to 7 km/sec by 3.18 mm spheres of like material. Flash radiography showed hole growth to be a two stage process with no 'rebound' of the hole periphery. Dissection techniques were developed to measure debris origin and velocity. High energy debris was found to depart the plates during the first stage ... |
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| RESEARCH AND CONSTRUCTION OF A MECHANICALLY ACCELERATED SABOT SYSTEM FOR THE PRODUCTION OF INTENSE MOLECULAR BEAMS. |
20 MAY 1969 |
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| Authors:
John E. Jordan; Orr Shepherd; AMERICAN SCIENCE AND ENGINEERING INC CAMBRIDGE MASS
|
| An experimental investigation has been undertaken of the Mechanically Accelerated Sabot System (MASS) which holds the promise of producing a molecular beam in the intermediate energy region. Apparatus has been constructed which permits the firing, in vacuum, a hollow, gas filled projectile from a high speed rifle. Provision has been made for localizing the combustion gases to prevent contamination of the main vacuum chamber in which the high ... |
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| High Pressure Hugoniot Data Obtained with a Manganin Piezoresistive Pressure Transducer. |
APR 1969 |
|
| Authors:
William H. Carden; G. P. Crotwell Jr; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFS TN
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| The investigation was initiated to develop the capability of making Hugoniot solid equation-of-state measurements using a piezoresistive pressure transducer and a two-stage light-gas gun. A Manganin-epoxy transducer was successfully developed to measure pressures up to 350 kilobars when impacted by high velocity cylindrical projectiles of the material being tested. The calibration of the transducer was verified by two independent methods using materials for which the Hugoniot was known. Finally, the ... |
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LIGHT GAS GUNS
