Vernon J. Rossow
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View article: Initiation of Long-Wave Instability of Vortex Pairs at Cruise Altitudes
Initiation of Long-Wave Instability of Vortex Pairs at Cruise Altitudes Open
Previous studies have usually attributed the initiation of the long-wave instability of a vortex pair to turbulence in the atmosphere or in the wake of the aircraft. The purpose here is to show by use of observations and photographs of con…
View article: On Multiple-Layered Vortices
On Multiple-Layered Vortices Open
As part of an ongoing effort to find ways to make vortex flow fields decompose more quickly, photographs and observations are presented of vortex flow fields that indicate the presence of multiple layers of fluid rotating about a common ax…
View article: Separation of Lift-Generated Vortex Wakes Into Two Diverging Parts
Separation of Lift-Generated Vortex Wakes Into Two Diverging Parts Open
As part of an ongoing study of the spreading rate of lift-generated vortex wakes, the present investigation considers possible reasons as to why segments of lift-generated wakes sometimes depart from the main part of the wake to move rapid…
View article: Lift enhancement by trapped vortex
Lift enhancement by trapped vortex Open
The viewgraphs and discussion of lift enhancement by trapped vortex are provided. Efforts are continuously being made to find simple ways to convert wings of aircraft from an efficient cruise configuration to one that develops the high lif…
View article: Effect of ground and/or ceiling planes on thrust of rotors in hover
Effect of ground and/or ceiling planes on thrust of rotors in hover Open
The thrust produced by a helicopter rotor hovering near ground and/or ceiling planes is investigated experimentally and theoretically. In the experiment, the thrust was measured on a 0.324-m-diam rotor operating between floor and ceiling p…
View article: Experimental investigation of wing fin configurations for alleviation of vortex wakes of aircraft
Experimental investigation of wing fin configurations for alleviation of vortex wakes of aircraft Open
A variety of fin configurations were tested on a model of the Boeing B747 in 40 by 80 foot wind tunnels. The test results confirmed that a reduction in wake rolling moment was brought about by the vortex shed by the fins so that a wide ran…
View article: Inviscid modeling of aircraft trailing vortices
Inviscid modeling of aircraft trailing vortices Open
A survey is presented of inviscid theoretical methods that are useful in the study of lift-generated vortices. Concepts derived using these invisicid theories are cited which have helped to guide research directed at alleviating the veloci…
View article: Experimental Study of the Effect of Span Loading on Aircraft Wakes
Experimental Study of the Effect of Span Loading on Aircraft Wakes Open
Measurements were made in the NASA-Ames 40- by 80-foot wind tunnel of the rolling moment induced on a following model in the wake 13.6 spans behind a subsonic transport model for a variety of trailing edge flap settings of the generator. I…
View article: Device measures conductivity and velocity of ionized gas streams
Device measures conductivity and velocity of ionized gas streams Open
This study identified several characteristics of psychiatrists that may affect their adherence to evidence-based prescribing practices for patients with schizophrenia.
View article: Time-dependent structure of one-dimensional magnetic compression waves in collisionless plasmas. Oblique ambient magnetic field
Time-dependent structure of one-dimensional magnetic compression waves in collisionless plasmas. Oblique ambient magnetic field Open
Structure of one-dimensional unsteady magnetic compression waves moving into ionized plasma embedded in magnetic field
View article: On the Induced Flow of an Electrically Conducting Liquid in a Rectangular Duct by Electric and Magnetic Fields of Finite Extent
On the Induced Flow of an Electrically Conducting Liquid in a Rectangular Duct by Electric and Magnetic Fields of Finite Extent Open
Reported here are the results of a systematic study of a model of the direct-current electromagnetic pump. Of particular interest is the motion imparted to the electrically conducting fluid in the rectangular duct by the body forces that r…
View article: Boundary-layer stability diagrams for electrically conducting fluids in the presence of a magnetic field
Boundary-layer stability diagrams for electrically conducting fluids in the presence of a magnetic field Open
From Summary: "The effectiveness of a magnetic field in stabilizing the laminar flow of an incompressible, electrically conducting fluid is studied. The neutral stability curves pertaining to a two-dimensional sinusoidal disturbance are pr…
View article: Development of a Piston-compressor Type Light-gas Gun for the Launching of Free-flight Models at High Velocity
Development of a Piston-compressor Type Light-gas Gun for the Launching of Free-flight Models at High Velocity Open
Report presenting testing of missiles in which temperatures are approximated and aerodynamic heating of the model is representative of that experienced by the missile in high-velocity flight. The paper describes a piston compressor type of…
View article: On flow of electrically conducting fluids over a flat plate in the presence of a transverse magnetic field
On flow of electrically conducting fluids over a flat plate in the presence of a transverse magnetic field Open
The use of a magnetic field to control the motion of electrically conducting fluids is studied. The incompressible boundary-layer solutions are found for flow over a flat plate when the magnetic field is fixed relative to the plate or to t…
View article: A theoretical study of the lifting efficiency at supersonic speeds of wings utilizing indirect lift induced by vertical surfaces
A theoretical study of the lifting efficiency at supersonic speeds of wings utilizing indirect lift induced by vertical surfaces Open
Report presenting a theoretical study of the possibility of improving the lifting efficiency of aircraft flying at supersonic speeds using indirect lift, which can be induced on the wing by the fuselage shape and/or wing end plates. Result…
View article: Applicability of the Hypersonic Similarity Rule to Pressure Distributions which Include the Effects of Rotation for Bodies of Revolution at Zero Angle of Attack
Applicability of the Hypersonic Similarity Rule to Pressure Distributions which Include the Effects of Rotation for Bodies of Revolution at Zero Angle of Attack Open
The analysis of Technical Note 2250, 1950, is extended to include the effects of flow rotation. It is found that the theoretical pressure distributions over drive cylinders can be related by the hypersonic similarity rule with sufficient a…
View article: An Analysis of the Applicability of the Hypersonic Similarity Law to the Study of Flow About Bodies of Revolution at Zero Angle of Attack
An Analysis of the Applicability of the Hypersonic Similarity Law to the Study of Flow About Bodies of Revolution at Zero Angle of Attack Open
The hypersonic similarity law as derived by Tsien has been investigated by comparing the pressure distributions along bodies of revolution at zero angle of attack. In making these comparisons, particular attention was given to determining …