| Resistojet Thruster Shield Evaluation |
OCT 87 |
27 pages |
| Authors:
A. B. Bailey; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFS TN
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 | A multipropellant resistojet was selected as a low-thrust option for the Space Station System. It is planned to use this system to dispose of a variety of excess fluids that are expected to be present on the space station and to use the thrust developed in this process for drag make up. It has been concluded that use of these excess fluids in this manner will result in a reduction ... |
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| Cluster Intensity and Velocity Measurements in Condensed Flows. |
SEP 1974 |
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| Authors:
A. B. Bailey; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN
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 | The objective of the present investigation has been to obtain further information concerning the condensation process in expanding flows. To this end, molecular beams formed from expansions of argon, nitrogen, carbon dioxide, nitric oxide, krypton, and a 10% krypton/argon mixture have been analyzed with a quadrupole mass spectrometer and a metastable velocity analyzer. By varying the energy of the ionizing electrons, it has been found that (1) at low source ... |
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| Formation of Mixed Molecular Clusters in Free-Jet Expansions. |
SEP 1974 |
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| Authors:
A. B. Bailey; H. M. Powell; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN
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| To determine the concentrations of jet engine pollutants in the stratosphere, it is necessary to obtain information concerning the molecular clustering characteristics of pollutant species. In the present investigation, a simulation of jet engine exhaust emissions has been accomplished by expanding various gas/water mixtures from a molecular beam source and mass analyzing the resulting molecular beam. It was found possible to produce ionic clusters containing various combinations of N2, CO2, ... |
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| Effects of Condensation on Gas Velocity in a Free-Jet Expansion. |
JUN 1973 |
36 pages |
| Authors:
A. B. Bailey; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN
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| An aerodynamic molecular beam has been used in an attempt to develop criteria for the determination of the onset of condensation in free-jet expansions of various gases. Measurements have been made of the total and monomer velocity distribution as a function of source pressure for the following conditions: (1) sonic orifice diameters of 0.0147, 0.0386, and 0.1245 cm, (2) source temperatures from 85 to 450K, (3) source pressures from 10 ... |
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| Mass Spectrometric Sampling of the Free-Jet Expansions of Gas Mixtures. |
JUN 1973 |
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| Authors:
A. B. Bailey; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN
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| To achieve a better understanding of the composition of the upper atmosphere, it is necessary to obtain more information on the reaction kinetics of cluster ions. The purpose of the present investigation has been to determine the feasibility of producing mixed molecular clusters in the free-jet expansions of a variety of gas mixtures. Mass spectra have been obtained from cluster beams formed by the expansions of water vapor, steam, sulfur ... |
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| Effect of Skimmer Interaction on the Properties of Partially Condensed Molecular Beams. |
AUG 1972 |
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| Authors:
A. B. Bailey; M. R. Busby; R. Dawbarn; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN
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| A considerable theoretical and experimental effort has been devoted to the problem of producing high-intensity molecular beams. These beams have been formed by skimming from the supersonic core of a free-jet expansion. Many experimental studies have been devoted to determining the effect of the skimmer upon the molecular beam properties. Through the extensive use of cryopumping in the source, collimation, and test chambers of a molecular beam test facility, it ... |
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| Cluster Formation in Free-Jet Expansions. |
APR 1972 |
129 pages |
| Authors:
A. B. Bailey; M. R. Busby; R. Dawbarn; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN
|
| An aerodynamic molecular beam has been used in an attempt to develop criteria for the determination of the onset of condensation in free-jet expansions of various gases. Measurements have been made of the total, monomer, dimer, trimer, etc., beam intensity and velocity distribution as a function of source pressure for the following conditions: (1) sonic orifice diameters of 0.0147, 0.0386, and 0.1245 cm, (2) 15-deg semiangle conical nozzle with a ... |
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| TURBULENT WAKE AND SHOCK SHAPE OF HYPERVELOCITY SPHERES. |
JUL 1966 |
46 pages |
| Authors:
A. B. Bailey; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN
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| Experiments were conducted to study some of the properties of the inner turbulent wake behind high speed spheres in free flight over a wide range of velocity and pressure. Schlieren and shadowgraph techniques were used to photograph the wake. It was shown that the growth of the inner wake close to the body is a function of velocity and ambient pressure. In the very far wake it was shown experimentally ... |
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| LAUNCHING OF FOAMED-PLASTIC MODELS WITH A TWO-STAGE LIGHT-GAS GUN. |
MAY 1966 |
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| Authors:
A. B. Bailey; K. E. Koch; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN
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| Techniques were developed to launch ultralightweight models (i.e., densities on the order of 1 lb/3 cu. ft.) from a two-stage light-gas gun. To date, spheres and cones have been launched with some success. The purpose of the development was to determine whether useful aerodynamic data (e.g., sphere drag) could be obtained in a short aeroballistic range at pressures on the order of 0.01 mm Hg. A number of spheres were ... |
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| SPHERE DRAG MEASUREMENTS IN AN AEROBALLISTICS RANGE AT HIGH VELOCITIES AND LOW REYNOLDS NUMBERS. |
MAY 1966 |
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| Authors:
A. B. Bailey; ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN
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| The drag coefficients of spheres for Re2 > 10 to the 4th have been measured in the velocity range 3000 < V sub infinity < 21,000 ft/sec with an accuracy of approximately + or - 1.5 percent. In addition, successful techniques for manufacturing and launching ultralightweight spheres (densities approaching 1 lb/cu ft) have resulted in the ability to measure sphere drag coefficient in the velocity range 3000 < V sub ... |
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Reports by Author
