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Y. I. Cho
Researcher at Jet Propulsion Laboratory
Publications - 5
Citations - 29
Y. I. Cho is an academic researcher from Jet Propulsion Laboratory. The author has contributed to research in topics: Sound pressure & Vortex. The author has an hindex of 2, co-authored 5 publications receiving 28 citations.
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Proceedings ArticleDOI
Wide-field shadowgraph flow visualization of tip vortices generated by a helicopter rotor
TL;DR: In this paper, a wide-field shadowgraph technique was used to visualize the vortex trajectory and vortex wake generated by helicopter rotors using a retro-reflective Scotchlite screen made it possible to investigate the flow field generated by fullscale tail rotors.
Proceedings ArticleDOI
High intensity tone generation by axisymmetric ring cavities on training projectiles
TL;DR: In this paper, an experimental investigation has been carried out on the production of high intensity tones by axisymmetric ring cavities and the results show that the sound pressure of about 115 dB at 1 meter distance can be generated by axismmetric rings cavities on projectiles moving at a relatively low flight speed equal to 65 m/s.
Fundamental study of flow field generated by rotorcraft blades using wide-field shadowgraph
TL;DR: In this paper, a wide-field shadowgraph technique was used to visualize the vortex trajectory and vortex wake generated by helicopter rotors using a retro-reflective Scotchlite screen.
Proceedings ArticleDOI
Aerodynamic sound generation induced by flow over small, cylindrical cavities
TL;DR: In this paper, an experimental investigation has been conducted on the production of high intensity tones by small cylindrical cavities in a flat surface, where sound intensity and frequency have been determined as functions of flow velocity, diameter and depth of the cavities.
Proceedings ArticleDOI
Yaw and spin effects on high intensity sound generation and on drag of training projectiles with ring cavities
TL;DR: In this paper, the effects of yaw, spin and geometric projectile parameters on sound pressure and drag were analyzed in a free jet facility with axisymmetric ring cavities.