CORNELL AERONAUTICAL LAB INC BUFFALO N Y

A FIELD INVESTIGATION AND NUMERICAL SIMULATION OF COASTAL FOG

FEB 1973

Authors: E.J. MACK; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The full text of this report is not available and therefore is not for sale. This information is provided for reference purposes only.

Inertia Measuring Equipment Design Study,

1973

Authors: C. H. Hutchinson; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

A practical method of measuring all moments and products of inertia of aircraft weighing up to 300,000 pounds was devised. Designs and specifications for the required equipment and instrumentation are presented. The measurement technique employs forced oscillation of a large platform upon which the aircraft is rigidly mounted. Forces and moments acting on the aircraft are resolved and summed in an orthogonal coordinate system during oscillation about each of three ...

Collection and Analysis of Sink Speed Data as Part of the X-22A Flight Research Program.

15 NOV 1972

Authors: John L. Beilman; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Very little experimental data exists on the landing impact loads encountered during landings of V/STOL airplanes. Development of criteria for predicting these loads has been initiated with the collection of data on the X-22A flight research program. Special instrumentation has been installed in the X-22A to measure sink rate data during landing approaches. The instrumentation was calibrated before and during the flight tests. Data was obtained for 31 landings, and ...

A Feasibility Study of an ASW Search Director Concept.

31 OCT 1972

Authors: William H. Brune; Richard J. Taylor; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

An exploratory investigation is performed of the feasibility and applicability of a Search Director concept for use by U.S. Navy ASW personnel in determining optimal search tactics and sonobuoy drop patterns to detect and localized submarines. Problems arise in conducting these operations which are due to the use of imprecise information from acoustic sensor surveillance systems. The purpose of the Search Director is to assemble this information in terms of ...

Investigations of Microwave Landing System Conventional and Doppler Scanning Beam Techniques.

SEP 1972

Authors: J. Beneke; C. W. Wightman; H. D. Becker; C. E. Kassel; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The report summarizes the results of analytical and experimental investigations carried out in support of the Microwave Landing System (MLS) program of the Federal Aviation Administration. The experimental program consisted of a simulation of the MLS signals that would be received in an aircraft. The systems simulated included conventional scanning beams with frequency and pulse angle coding, step-scan beams with frequency and time interval coding and the doppler scan technique. ...

PROJECT FOG DROPS PART I INVESTIGATIONS OF WARM FOG PROPERTIES

AUG 1972

Authors: R. PILIE; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Two-Dimensional Effects in Laser-Solid Simulation Studies.

JUN 1972

Authors: J. W. Daiber; H. M. Thompson; R. G. Rehm; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The objective of the program is to study the two-dimensional wave motions induced in a target by high-power laser radiation. For these studies the target is an axisymmetric, supersonic free-jet of hydrogen gas which is laser irradiated on axis. The transparency of the target permits luminosity and schlieren streak photography of the forward-facing waves that propagate into the high-pressure plenum. Measurements of the axial and lateral luminous plasma frowth and ...

Parametric Studies of the DF-CO2 Chemical Transfer Laser.

JUN 1972

Authors: Theodore J. Falk; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Parametric studies of the power output of a D2/F2/CO2 laser were performed. A transverse-flow nitric-oxide-initiated De/F2/CO2 laser was constructed and tested at various power levels up to 560 watts. It was found that: viscous and thermal boundary layers had negligible effect in 1 inch x 6 inch flow channel tested. With a fixed optical cavity and with constant flow rates of deuterium, fluorine, and carbon dioxide, the effects of nitric ...

Wake Laboratory Experiment.

JUN 1972

Authors: Gordon E. Merritt; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The objective of the research is to obtain data that can be used to predict the concentration of a passive tracer released into the wake of a submarine traveling through a stratified ocean. To develop this prediction capability, information is required on the wake shape and size. Two unique curves are obtained for estimating the horizontal width and vertical height of a wake in a stratified flow. Equations were developed ...

Evaluation of Lateral-Directional Handling Qualities and Roll-Sideslip Coupling of Fighter Class Airplanes.

MAY 1972

Authors: Edward M. Boothe; Michael L. Parrag; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Lateral-directional handling qualities for Class 4 airplanes in Flight Phase Category A were investigated in the USAF/CAL variable stability NT-33A airplane. The primary purpose was to extend the data base for roll-sideslip coupling requirements specified by MIL-F-8785B(ASG) for this Class of airplanes. Other purposes included evaluation of the minimum Dutch roll frequency and damping requirements of MIl-F-8785B (ASG) for Class 4 airplanes in Flight Phase Category A and an investigation ...

Evaluation of Lateral-Directional Handling Qualities and Roll-Sideslip Coupling of Fighter Class Airplanes.

MAY 1972

Authors: Edward M. Boothe; Michael L. Parrag; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Maneuvering tasks representative of the fighter mission and a precision bank angle tracking task were performed for evaluations. Evaluations were conducted at three Dutch roll frequencies, three roll-to-sideslip ratios and at values of Dutch roll damping on either side of the MIL-F-8785B(ASG) boundary. Satisfactory flying qualities were not obtained for any of the low Dutch roll frequency configurations investigated in this experiment. The Dutch roll damping requirements were found to ...

Transient Response of a Mass Spectrometer with a Brink Ionizer.

APR 1972

Authors: George T. Skinner; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

A study has been made of the performance of a Brink ionizer which is part of a mass spectrometer in a molecular-beam apparatus. It has been shown that the potentials applied to the exit apperature plate have a pronounced effect on which regions of the ionizer contribute the bulk of the selected ions passed through the mass filter. The properly adjusted instrument has been used to observe the scattering of ...

EXPERIMENTAL PLASMA STUDIES

MAR 1972

Authors: M.G. DUNN; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Capability of the Total In-Flight Simulator (TIFS).

FEB 1972

Authors: Philip A. Reynolds; Richard Wasserman; Gardner J. Fabian; Paul R. Motyka; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

THE REALISM POSSIBLE IN ITS SEPARATE, NEW EVALUATION COCKPIT. The capabilities and features of this in-flight simulator considerably broaden the ability of the aircraft designer to deal with difficult trade-offs in flying qualities problems. A base configuration can be set up and then its stability and control characteristics can be systematically varied for investigations to gain research knowledge pertinent to flight vehicle and flight control system design. The report describes ...

Experimental Studies of Photoionization Processes in Air.

FEB 1972

Authors: Walter H. Wurster; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

An experimental study is described whose objective is to assess the role of NO in the nonequilibrium vacuum ultraviolet (VUV) radiation from shock-heated air. The experiment utilizes a splitter-plate shock tube technique wherein the VUV radiation behind a reflected shock is used as a light source to measure the absorption by gases processed only by the incident shock wave. In addition, nonequilibrium radiation profiles behind strong incident shock waves are ...

Flight Control Principles for Control Configured Vehicles.

JAN 1972

Authors: Edmund G. Rynaski; Norman C. Weingarten; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The compatibility between maneuver load control, relaxed static stability, and flying qualities requirements is investigated in the report. Three steps were involved in the investigation: an analysis was made of control surface combinations and their effectiveness for maneuver load control when used with an airplane having shortened tail length and reduced tail surface area, control system configurations were synthesized that minimize a weighted measure of change in drag, wing root ...

Vibrational Relaxation of CO2 in Expanding Flows.

JAN 1972

Authors: Anthony L. Russo; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Vibrational relaxation of CO2 with Ar, N2, and CO and the vibrational relaxation of pure CO have been studied in shock-tube driven, quasi-steady supersonic expansion flows in a two-dimensional wedge nozzle. The experiments were conducted over a range of reservoir temperatures of about 2500K to about 4000K and at a reservoir pressure of about 20 atm. The diagnostic technique was based on quantitative measurements of infrared radiation from CO2 and ...

A Flight Test Investigation of Direct Side Force Control.

SEP 1971

Authors: G. Warren Hall; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The concept of developing a controllable side force by deflecting the rudder and utilizing asymmetrical drag to cancel the resulting yawing moment was flight tested using the USAF/CAL variable stability T-33 airplane Primary objectives of the investigation were to mechanize a system that allowed direct control of side force, qualitatively evaluate the usefulness of direct side force control and evaluate the type of controller that might be useful in its ...

Preliminary Handling Qualities Requirements for Lifting Re-Entry Vehicles during Terminal Flight.

AUG 1971

Authors: Dante A. DiFranco; John F. Mitchell; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Preliminary handling qualities requirements for lifting re-entry vehicles during terminal flight at low supersonic, transonic, and subsonic speeds are presented and discussed. Included are a preliminary draft of a flying qualities specification for piloted re-entry vehicles and the rationale and backup data upon which the flying qualities requirements are based. Many of the requirements were adapted from, or are similar to, the requirements for piloted airplanes presented in the latest ...

The Development of Flying Qualities for Lifting Re-Entry Vehicles during Terminal Flight.

JUL 1971

Authors: Dante A. DiFranco; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The report summarizes a three-year effort which led to the development of a preliminary specification for the flying qualities of piloted re-entry vehicles during terminal flight. Part of this effort was directed at the preparation of the rationale and backup data upon which the flying qualities requirements are based. The effort included support of the FDL-8 lifting body program at the Air Force Flight Dynamics Laboratory from the standpoint of ...

An Experimental Doppler Radar and Antenna Positioning System for the AFFDL 50-MW Electrogasdynamics Facility.

JUL 1971

Authors: H. W. Prinsen; R. H. Jarvis; S. G. Margolis; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

A K sub a band CW high-resolution doppler radar and antenna positioning system was designed, constructed and installed in the U.S. Air Force Flight Dynamics Laboratory 50-Megawatt Electrogasdynamics Facility. It was intended for use as a diagnostic tool in investigating and measuring electronic characteristics and velocity of ionized flow in the test section. (Author)

Advances in Doppler Weather Radar Observing Methods and Data Processing Techniques.

JUL 1971

Authors: Calvin C. Easterbrook; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

A continuing objective of the Navy-sponsored, Doppler radar studies has been to develop the operational utility of the radar, both as a weather research tool and as an observing instrument useful for specialized, short-term forecasting. To fill this role effectively, observing techniques and data processing methods must be developed that will permit a single Doppler radar to work alone. The work discussed in this report deals with attempts to push ...

Experimental Studies of Photoionization Processes in Air.

01 MAY 1971

Authors: Walter H. Wurster; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

An experimental study is described whose objectives is to assess the role of NO in the nonequilibrium vacuum ultraviolet (VUV) radiation from shockheated air. The experiment utilizes a splitter-plate shock tube technique wherein the VUV radiation behind a reflected shock is used as a light source to measure the absorption by gases processed only by the incident shock wave. In addition, nonequilibrium radiation profiles behind strong incident shock waves are ...

A Stress Corrosion Cracking Model.

MAY 1971

Authors: Richard C. Fabiniak; Thaddeus J. Fabiniak; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The characteristic susceptibility to stress-corrosion cracking exhibited by certain titanium and many aluminum alloys was studied. Mechanisms germane to establishing the conditions for stress-corrosion cracking in heat-treatable alloys during precipitation hardening are covered. A 7075 A1 alloy and an A1-Zn-Mg ternary alloy were used in construction of a stress-corrosion model. The model showed that the stress corrosion cracking susceptibility of A1 alloys becomes reduced if one or more of the ...

The Aerodynamic and Aeroelastic Characteristics of a Full-Scale Rotor Operating at very High Advance Ratios and during Start/Stop Operation.

MAY 1971

Authors: Andrew R. Trenka; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The purpose of this program was to study the aerodynamic and aeroelastic behavior of a rigid two-bladed rotor system operating at steady-state advance ratios up to approximately 15. Also to be investigated was the operation of this rotor during periods of acceleration and deceleration which were representative of the starting/stopping sequence of a stowable rotor. The objective of the program was accomplished by conducting wind tunnel tests in the NASA-Ames ...

Some Characteristics of As-Grown Aluminum Alloy Single Crystals.

MAY 1971

Authors: Richard C. Fabiniak; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Single crystals of binary and ternary aluminum alloys with constituents having compositions within the commercial range, of high strength aluminum alloys were grown and their mechanical properties were characterized to provide a frame of reference for stress, corrosion and other studies of similar alloys. Each crystal was tested in tension and plots of resolved shear stress vs shear strain were made from load vs elongation curves. From these plots, the ...

Report on a Study of Noise Generation by a Rotating Blade Row in an Infinite Annulus.

MAY 1971

Authors: John A. Lordi; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Discrete-tone noise generation by high-speed fans and compressors has been studied by applying existing theories for the flow through a rotating blade row in an infinitely long annulus. McCune's analysis for the linearized, three-dimensional, compressible flow through a nonlifting blade row and its recent extension to lifting blades have both been used to find the acoustic disturbances produced by such flows. These analyses contain the cutoff condition for the duct ...

The Generation of a Military Specification for Flying Qualities of Piloted V/STOL Aircraft-MIL-F-83300.

APR 1971

Authors: David L. Key; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The document describes a four year effort which led to the adoption of a new military specification MIL-F-83300, 'Flying Qualities of Piloted V/STOL Aircraft', and the publication of a supporting document, 'Background Information and User Guide for MIL-F-83300, Military Specification - Flying Qualities of Piloted V/STOL Aircraft' (AFFDL-TR-70-88). Included in the report is an assessment of the status of V/STOL flying qualities research and recommendations for future work. (Author)

Flowfield Surveys in the Leading Edge Region of a Sharp Flat Plate.

FEB 1971

Authors: Robert J. Vidal; Gordon E. Merritt; John A. Bartz; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Data obtained in the hypersonic viscous shock layer of a sharp flat plate are presented. These were obtained with speed-ratio probes operating under free-molecule conditions, and the measurements are interpreted with the theory for free-molecule flows as the local speed-ratio, and the local value of the product. These show that the initial disturbance from the plate extends about twelve ambient mean-free-paths ahead of the leading edge. In the immediate vicinity ...

Fire Fighter's Exposure Study.

DEC 1970

Authors: Kenneth W. Graves; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Experimental fires from pools of burning aircraft fuels were instrumented with heat meters to determine heat flux distributions for application to the design of protective clothing for firefighting personnel. The spectral distribution of infrared radiation emitted by fires was also measured. Conditions affecting the fires and the resulting heat effects that were studied were wind velocity, fuel pool area, time of burning, orientation around the fire relative to wind direction, ...

The CAL Shock-Tube-Driven Molecular Beam: Crossed Beam Scattering.

DEC 1970

Authors: George T. Skinner; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The use of the CAL shock-tube-driven molecular beam, in conjunction with its target beam and mass spectrometer, to measure scattered intensity at various angles from the main beam axis is reported. A 2.2 eV argon beam was fired into both argon and nitrogen target beams. The test chamber can be held at pressures in the low 10 to the -9th torr range. The mass spectrometer can be operated at very ...

An In-Flight Investigation of Lateral-Directional Dynamics for the Landing Approach.

OCT 1970

Authors: G. Warren Hall; Edward M. Boothe; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Lateral-directional handling qualities and roll control power requirements for executive jet and military Class II Airplanes in the landing approach flight phase were investigated in the variable stability T-33 airplane. Particular emphasis was placed on the effects of crosswinds and turbulence. Simulated IFR ILS approaches and VFR offset and crosswind approaches were made. Specifically, two Dutch roll frequencies, three Dutch roll damping ratios, three roll-to-sideslip ratios and three roll mode ...

Flowfield Surveys in the Hypersonic Viscous Shock Layer on a Sharp Flat Plate,

SEP 1970

Authors: Robert J. Vidal; John A. Bartz; Gordon E. Merritt; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Flowfield surveys were obtained in the hypersonic viscous shock layer on a sharp flat plate with probes measuring the local molecular speed-ratio and local values of the product of density, velocity, and total enthalpy. The data define a disturbance boundary upstream of the leading edge where compression effects first begin, and a boundary within the shock layer where viscous heating effects begin to dominate over the compression effects. (Author)

System Description and Performance Data for the USAF/CAL Variable Stability T-33 Airplane.

AUG 1970

Authors: G. Warren Hall; Ronald W. Huber; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The USAF/CAL variable stability T-33 airplane is a jet trainer which has been extensively modified for use as a research vehicle. A response-feedback system allows the normal T-33 derivatives to be augmented so that handling qualities of existing airplanes, future airplanes, or hypothetical configurations may be simulated in flight or in a fixed-base ground simulator. The report attempts to provide an updated functional description of the variable stability T-33. The ...

AIRFOILS IN TWO-DIMENSIONAL NONUNIFORMLY SHEARED SLIPSTREAMS.

JUL 1970

Authors: Gary R. Ludwig; John C. Erickson Jr; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

A theoretical and experimental program was conducted to investigate the aerodynamics of an airfoil in a two-dimensional nonuniformly sheared slipstream. A mathematical model was developed to predict airfoil pressure distributions in such a slipstream and was used successfully for slipstreams with moderate shear. Pressure distributions over a wide angle of attack range were measured experimentally on an airfoil at each of seven different locations in a highly sheared two-dimensional slipstream. ...

A Study of Relationships Between Aircraft System Performance and Pilot Ratings.

JUL 1970

Authors: W. C. Schultz; F. D. Newell; R. F. Whitbeck; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

This study examines the relationship between man-machine system performance and pilot evaluation data. Pilot ratings and pilot evaluation comments have been the only consistent means for evaluating the physical characteristics of the pilot-aircraft system. On the other hand, efforts have been made to develop analytical predictors of man-machine performance, such as the pilot transfer functions or quadratic performance indices. Analytical predictors of performance must be validated by experiments and the ...

DESIGN STUDIES OF THE XM140 BARREL VOLUME III.

MAY 70

Authors: D. E. Adams; W. R. Brown; F. A. Vassallo; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

This report describes an improvement in the ablative fluid configuration within the case and the single-shot and rapid fire tests that were conducted to prove the feasibility of the system. Experimental determinations of barrel temperatures above which permanent deformation of the barrel is likely are also included. A few tests are included of a different ablator container and semi-solid ablators. (P.S.-PL) ANNOTATION: Design studies of the XM140 automatic gun barrel. ...

AN INVESTIGATION OF ROTATING STALL PHENOMENA IN TURBINE ENGINE COMPRESSORS.

MAY 1970

Authors: Gary R. Ludwig; Joseph P. Nenni; Roy S. Rice Jr; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The work encompasses both theoretical and experimental studies of rotating stall and an investigation of the requirements for a stall control system. The theoretical studies approached the problem primarily from the point of view that rotating stall is the consequence of an instability of the mean flow to small disturbances. Both two-dimensional flows and a certain class of three-dimensional flows with wheel-type swirl were studied. In addition, numerical experiments were ...

A Terminal Guidance Theory Using Dynamic Programming Formulation.

MAY 1970

Authors: Chi S. Chang; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Studies of Barium Excitation by Molecular Beam Magnetic Resonance Techniques.

APR 1970

Authors: Robert A. Fluegge; Dale Headrick; Donald Landman; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The report presents the results of an investigation of Barium excitation by molecular beam magnetic resonance techniques. The results of both depopulation and ionization experiments are consistent and confirm that the metastable states in barium are strong contributors to photoionization in barium clouds under solar radiation. The depopulation experiments indicate that the major losses occur due to photons near 3005 A and that considerable metastable density increases occur when the ...

THE DETERMINATION OF UNSTEADY AERODYNAMICS OF A TWO-DIMENSIONAL JET-FLAP WING.

APR 1970

Authors: Andrew R. Trenka; John C. Erickson Jr; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

One of the purposes of the study was to conduct wind-tunnel tests on a two-dimensional, oscillating, jet-flap airfoil to determine the unsteady forces, moments, and pressure distributions. These tests were to (1) provide data for testing the validity of the theoretical results, and (2) to furnish guide-lines for the further development of unsteady jet-flap airfoil theory. The study was also to extend the solutions to the general theoretical equations describing ...

RESEARCH ON SURFACE CATALYSIS IN NONEQULIBRIUM FLOWS.

APR 1970

Authors: John A. Bartz; Robert J. Vidal; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The report describes the results of a program of research to develop a catalytic probe with a discontinuous catalytic surface. The ultimate objective is to use the probe to measure the ambient oxygen atom concentrations in high-temperature wind tunnel facilities, and a discontinuous catalytic surface was used to increase the probe sensitivity to small atom concentrations. The report first reviews the theoretical basis for this probe configuration, and then presents ...

The Feasibility and Use of Anti-Torque Surfaces Immersed in Helicopter Rotor Downwash.

FEB 1970

Authors: Chee Tung; John C. Erickson Jr.; Frank A. DuWaldt; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

An analytical investigation was made of the effectiveness of anti-torque aerodynamic surfaces immersed in helicopter rotor downwash. It is shown that additional vertical tail surface having areas equal to about two percent of the main rotor disk area could provide torque trim for speeds above about 75 ft/sec for representative current vehicles. (Author)

RESEARCH ON ADVANCED GASDYNAMIC FACILITIES.

FEB 1970

Authors: CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Progress is reported on a research program which has the objective of investigating new techniques for producing hypervelocity flows in aerodynamic test facilities. One phase is a study utilizing high peak-power lasers and another phase is a study of the isentropic-compression tube. Both of these approaches are being considered as possible means of heating and accelerating test gases. (Author)

THE REACTING WAKE PROGRAM USER'S GUIDE.

FEB 1970

Authors: James T. Curtis; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

The program computes the species concentrations and electron density, and pressure, temperature, velocity, density and wake radii within a reacting turbulent wake of a hypervelocity sphere. (Author)

THEORETICAL AND EXPERIMENTAL STUDIES OF THE SHOCK WAVE-BOUNDARY LAYER INTERACTION ON COMPRESSION SURFACES IN HYPERSONIC FLOW.

JAN 1970

Authors: Michael S. Holden; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

A detailed description is given of the theoretical and experimental studies of shock wave-laminar boundary layer interaction on curved compression surfaces in hypersonic flow. Integral forms of the boundary layer equations were used for the conservation of mass, streamwise momentum, normal momentum, moment of streamwise momentum and energy to describe the development of attached and separated boundary layers on a curve surface. In the experimental study, skin friction, heat transfer ...

CONICAL ELECTROSTATIC PROBES IN A CONTINUUM FLOWING PLASMA.

JAN 1970

Authors: John K. Dukowicz; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

A theory is presented for electrostatic probes used in continuum flowing plasmas under conditions when charged particle diffusion effects can be neglected in comparison with the effects of convection and the electric field. The theory is applied to the case of a 10 degree half-angle conical probe in an incompressible, inviscid flow field. Calculated results are presented for a range of parameters. The theoretical results are compared with the results ...

MEASUREMENTS OF THE VIBRATIONAL RELAXATION RATES OF NITROGEN AND OXYGEN.

DEC 1969

Authors: Anthony L. Russo; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

An infrared diagnostic method has been developed and used to observe the vibrational relaxation of N2 using CO additive and O2 using H2O additive. Relaxation rate data for both N2 and O2 are obtained behind shock waves which are in very good agreement with other published data. Similar measurements in nozzle expansion flows of N2 indicate lower vibrational temperatures than anticipated on the basis of the shock-wave data. This work ...

PROJECT THROMBUS SURFACE PROPERTIES OF MATERIALS FOR PROSTHETIC IMPLANTS.

01 OCT 1969

Authors: Robert E. Baier; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Data was gathered to allow some cautious generalizations to be drawn about the change in plastic vena cava rings' surface properties which occurs during implantation. The nature of the change should correlate with the thromboresistance of the various materials. The initial generalizations are these: During implantation, all materials rapidly adsorb a tenaciously adherent coating of protein. On most materials, this adsorbed protein layer substantially changes the ...

AN IN-FLIGHT INVESTIGATION OF LATERAL-DIRECTIONAL DYNAMICS FOR CRUISING FLIGHT.

OCT 1969

Authors: G. Warren Hall; CORNELL AERONAUTICAL LAB INC BUFFALO N Y

An in-flight investigation using a variable stability airplane has shown that some degree of spiral stability is desirable in cruising flight and that not all aspects of a stable spiral are necessarily good. The amount of spiral stability needed and the acceptability of the handling qualities are a function of roll damping, roll-to-sideslip ratio and aileron friction characteristics. A basic configuration representative of high altitude, high speed executive jet airplane ...