Laura K. Kushner

Why Balloons Make a Loud Noise When They Pop

Edward Ross, Jayanta Panda, James C. Ross, Laura K. Kushner

Measurements of balloon loudness and pressure signatures are presented for a variety of balloon shapes. The loudness and recordings were made 3.2 meters from the popped balloons. The balloons were of 3 types: round, long, and extremely long (the same type that …

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Shape and Angle-of-Attack Measurements of Ram-Air Parachutes by Stereo Photogrammetry in the National Full-Scale Aerodynamics Complex

Edward T. Schairer, James T. Heineck, Laura K. Kushner, Kenneth J. Desabrais et autres

US Army MC-4/5 ram-air parachutes were tested in the 80- by 120-Ft test section of the National Full-Scale Aerodynamics Complex. Arrays of targets on the upper and lower surfaces of the central cell of the canopies were measured by stereo photogrammetry, and …

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Nozzle Plume/Shock Interaction Experimental and Computational Sonic Boom Analyses from the NASA Ames 9- by 7-Foot Supersonic Wind Tunnel

Donald A. Durston, Susan E. Cliff, Marie F. Denison, James C. Jensen et autres

A wind tunnel test and a computational study were conducted to investigate the complex interactions between a supersonic nozzle plume and shock waves of differing strengths generated from various aft surfaces typical of supersonic aircraft. These analytically-defined aft surfaces were representative of …

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Measurements of Parachute Dynamics in the World’s Largest Wind Tunnel by Stereo Photogrammetry

Edward T. Schairer, Laura K. Kushner, James T. Heineck, Eduardo Solis

Between 2012 and 2017, parachutes for four NASA Projects were tested in the 80- by 120-Ft test section of the National Full-Scale Aerodynamic Complex (NFAC) at NASA Ames Research Center. These projects were: (1) Low-Density Supersonic Decelerator (LDSD); (2) Capsule Parachute Assembly …

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Sub-Scale Orion Parachute Test Results From the National Full-Scale Aerodynamics Complex 80- by 120-ft Wind Tunnel

Brian P. Anderson, James Greathouse, Jessica M. Powell, James C. Ross et autres

A two-week test campaign was conducted in the National Full-Scale Aerodynamics Complex 80 x 120-ft Wind Tunnel in support of Orion parachute pendulum mitigation activities. The test gathered static aerodynamic data using an instrumented, 3-tether system attached to the parachute vent in …

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Model Deformation and Optical Angle of Attack Measurement System in the NASA Unitary Plan Wind Tunnel

Laura K. Kushner, Bethany A. Drain, Edward T. Schairer, James T. Heineck et autres

Both AoA and MDM measurements can be made using an optical system that relies on photogrammetry. Optical measurements are being requested by customers in wind tunnels with increasing frequency due to their non-intrusive nature and recent hardware and software advances that allow …

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Stereo Photogrammetry Measurements of the Position and Attitude of a Nozzle-plume/Shock-wave Interaction Model in the NASA Ames 9- by 7- Ft Supersonic Wind Tunnel

Edward T. Schairer, Laura K. Kushner, Bethany A. Drain, James T. Heineck et autres

Stereo photogrammetry was used to measure the position and attitude of a slender body of revolution during nozzle-plume/shock-wave interaction tests in the NASA Ames 9- by 7-Ft Supersonic Wind Tunnel. The model support system was designed to allow the model to be …

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Model Deformation Measurements of the Truss-Braced Wing Aircraft in the NASA Ames 11-By 11-Ft Transonic Wind Tunnel

Bethany A. Drain, Laura K. Kushner, Edward T. Schairer, James T. Heineck

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Turbulence investigation of the NASA common research model wing tip vortex

Djordje Cantrak, James T. Heineck, Laura K. Kushner, Novica Z. Janković

The paper presents high-speed stereo particle image velocimetry investigation of the NASA Common Research Model wing tip vortex. A three-percent scaled semi?span model, without nacelle and pylon, was tested in the 32- by 48-inch Indraft tunnel, at the Fluid Mechanics Laboratory at …

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Simulation of Sweep-Jet Flow Control, Single Jet and Full Vertical Tail

Robert E. Childs, Paul M. Stremel, Laura K. Kushner, James T. Heineck et autres

This work is a simulation technology demonstrator, of sweep jets used to suppress boundary layer separation and increase maximum achievable load coefficients. A sweep jet is a discrete Coanda jet that oscillates in the plane parallel to an aerodynamic surface. It injects …

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Model Deformation Measurements of Sonic Boom Models in the NASA Ames 9- by 7- Ft Supersonic Wind Tunnel

Edward T. Schairer, Laura K. Kushner, Theodore J. Garbeff, James T. Heineck

The deformations of two sonic-boom models were measured by stereo photogrammetry during tests in the 9- by 7-Ft Supersonic Wind Tunnel at NASA Ames Research Center. The models were geometrically similar but one was 2.75 times as large as the other. Deformation …

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Visualization of a Sweeping Jet by Laser Speckle Retro-reflective Background Oriented Schlieren

Laura K. Kushner, James T. Heineck, Bruce L. Storms, Robert Childs

Sweeping jet actuators are currently being studied as a method of active flow control to increase the performance of wings and tails. Computational Fluid Dynamics simulations show that the jet does not sweep at a constant rate, instead spending more time at …

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