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There are a total of 21 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Fundamental study of flow field generated by rotorcraft blades using wide-field shadowgraph
Author(s): Parthasarathy, S. P.; Cho, Y. I.; Back, L. H.
Abstract: The vortex trajectory and vortex wake generated by helicopter rotors are visualized using a wide-field shadowgraph technique. Use of a retro-reflective Scotchlite screen makes it possible to investigate the flow field ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1985
Added to NTRS: 2004-11-03
Accession Number: 86N15249; Document ID: 19860005779; Report Number: JPL-PUB-85-64, NAS 1.26:176443, NASA-CR-176443
Measurement of sound emitted by flying projectiles with aeroacoustic sources
Author(s): Cho, Y. I.; Shakkottai, P.; Harstad, K. G.; Back, L. H.
Abstract: Training projectiles with axisymmetric ring cavities that produce intense tones in an airstream were shot in a straight-line trajectory. A ground-based microphone was used to obtain the angular distribution of sound ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1988
Added to NTRS: 2004-11-03
Accession Number: 89A29305; Document ID: 19890041934
Fluid particle motion and Lagrangian velocities for pulsatile flow through a femoral artery branch model
Author(s): Cho, Y. I.; Crawford, D. W.; Back, L. H.; Back, M. R.
Abstract: A flow visualization study using selective dye injection and frame by frame analysis of a movie provided qualitative and quantitative data on the motion of marked fluid particles in a 60 degree artery branch model for ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1987
Added to NTRS: 2004-11-03
Accession Number: 88A20310; Document ID: 19880033083
Yaw and spin effects on high intensity sound generation and on drag of training projectiles with ring cavities
Author(s): Parthasarathy, S. P.; Cho, Y. I.; Kwack, E. Y.; Back, L. H.
Abstract: Projectiles containing axisymmetric ring cavities constitute aeroacoustic sources. These produce high intensity tones which are used for coding in the SAWE (Simulation of Area Weapons Effects) system. Experimental data ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1986
Added to NTRS: 2004-11-03
Accession Number: 86A19924; Document ID: 19860035186; Report Number: AIAA PAPER 86-0515
Rain simulation studies for high-intensity acoustic nose cavities
Author(s): Clayton, R. M.; Cho, Y. I.; Shakkottai, P.; Back, L. H.
Abstract: Unarmed plastic projectiles can be equipped with small axisymmetric cavities for the generation of intense tones that are useful in training maneuvers. Attention is presently given to the simulation of rainfall in an ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1988
Added to NTRS: 2004-11-03
Accession Number: 88A45689; Document ID: 19880058462
Aerodynamic sound generation induced by flow over small, cylindrical cavities
Author(s): Parthasarathy, S. P.; Cho, Y. I.; Back, L. H.
Abstract: An experimental investigation has been conducted on the production of high intensity tones by small cylindrical cavities in a flat surface. The application of such a mechanism is to the acoustic coding of moving objects ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1984
Added to NTRS: 2004-11-03
Accession Number: 85A10827; Document ID: 19850028676; Report Number: AIAA PAPER 84-2258
Fluid dynamic study in a femoral artery branch casting of man with upstream main lumen curvature for steady flow
Author(s): Cho, Y. I.; Back, L. H.; Back, M. R.
Abstract: An in-vitro, steady flow investigation was conducted in a hollow, transparent vascular replica of the profunda femoris branch of man for a range of physiological flow conditions. The replica casting tested was obtained from ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1985
Added to NTRS: 2004-11-03
Accession Number: 86A45254; Document ID: 19860060516
Measurement and prediction of flow through a replica segment of a mildly atherosclerotic coronary artery of man
Author(s): Back, L. H.; Radbill, J. R.; Cho, Y. I.; Crawford, D. W.
Abstract: Pressure distributions were measured along a hollow vascular axisymmetric replica of a segment of the left circumflex coronary artery of man with mildly atherosclerotic diffuse disease. A large range of physiological ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1986
Added to NTRS: 2004-11-03
Accession Number: 86A43440; Document ID: 19860058702
Pool fires in a simulated aircraft cabin interior with ventilation
Author(s): Bankston, C. P.; Back, L. H.; Cho, Y. I.; Shakkottai, P.
Abstract: Results of experiments conducted at the JPL to evaluate aircraft postcrash fire hazards are presented. The experiments were carried out in a one-third scale simulated aircraft cabin geometry to study pool fire and ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1987
Added to NTRS: 2004-11-03
Accession Number: 87A53783; Document ID: 19870066509
Experimental study of pulsatile and steady flow through a smooth tube and an atherosclerotic coronary artery casting of man
Author(s): Cho, Y. I.; Back, L. H.; Cuffel, R. F.; Crawford, D. W.
Abstract: No Abstract Available
NASA Center: Jet Propulsion Laboratory
Publication Year: 1983
Added to NTRS: 2004-11-03
Accession Number: 84A34962; Document ID: 19840052175
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