scholarly journals Plume and Shock Interaction Effects on Sonic Boom in the 1-foot by 1-foot Supersonic Wind Tunnel

2015 ◽  
Author(s):  
Raymond S. Castner ◽  
Susan E. Cliff ◽  
Alaa A. Elmiligui ◽  
Courtney Winski
Keyword(s):  
Wind Tunnel ◽  
Interaction Effects ◽  
Sonic Boom ◽  
Shock Interaction ◽  
Supersonic Wind Tunnel

Nozzle Plume/Shock Interaction Sonic Boom Test Results from the NASA Ames 9- by 7-Foot Supersonic Wind Tunnel

2017 ◽  
Author(s):  
Donald A. Durston ◽  
Susan E. Cliff ◽  
Marie Denison ◽  
Derek Dalle ◽  
Raymond S. Castner ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Sonic Boom ◽  
Shock Interaction ◽  
Test Results ◽  
Supersonic Wind Tunnel

scholarly journals Condensation effects on Rayleigh scattering measurements in a supersonic wind tunnel

AIAA Journal ◽  
1991 ◽  
Vol 29 (2) ◽  
pp. 242-246 ◽  
Author(s):  
B. Shirinzadeh ◽  
M. E. Hillard ◽  
R. J. Exton
Keyword(s):  
Wind Tunnel ◽  
Rayleigh Scattering ◽  
Supersonic Wind Tunnel ◽  
Scattering Measurements

scholarly journals Supersonic Windtunnel Noise Attenuation

2021 ◽  
Author(s):  
William Wai Lim Wong
Keyword(s):  
Wind Tunnel ◽  
Sound Pressure Level ◽  
Noise Level ◽  
Sound Pressure ◽  
Power Level ◽  
Mesh Size ◽  
Acoustic Power ◽  
Pressure Level ◽  
Supersonic Wind Tunnel ◽  
Acoustic Treatment

The aerodynamic generated noise in the supersonic wind tunnel during operation at Ryerson University has exceeded the threshold of hearing damage. An acoustic silencer was to be designed and added to the wind tunnel to reduce the noise level. The main sources of noise generated from the wind tunnel with the silencer were identified to be located at the convergent divergent nozzle and the turbulent region downstream of the shock wave at the diffuser with the maximum acoustic power level of the entire wind tunnel at 161.09 dB. The designed silencer provided an overall sound pressure level reduction of 21.41 db which was considered as acceptable. Refinement to the mesh size and changes to the geometry of the mixing chamber was suggested for a more accurate result in noise output as well as flow conditions would match up to the physical flow. Additional acoustic treatment should be applied to the wind tunnel to further reduce sound pressure level since the noise level still exceeded the threshold of hearing loss.

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