Turbulence Associated with Broadband Shock Noise in Hot Jets | Zendy

James Bridges | Zendy; Mark P. Wernet | Zendy

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Turbulence Associated with Broadband Shock Noise in Hot Jets

Author(s) -

James Bridges,

Mark P. Wernet

Publication year - 2008

Publication title -

nasa sti repository (national aeronautics and space administration)

Language(s) - English

Resource type - Conference proceedings

DOI - 10.2514/6.2008-2834

Subject(s) - turbulence , noise (video) , broadband , shock (circulatory) , physics , acoustics , aerospace engineering , computer science , mechanics , engineering , optics , medicine , artificial intelligence , image (mathematics)

Time-Resolved Particle Image Velocimetry (TRPIV) has been applied to a series of jet flows to measure turbulence statistics associated with broadband shockassociated noise (BBSN). Data were acquired in jets of Mach numbers 1.05, 1.185, and 1.4 at different temperatures. Both convergent and ideally expanded nozzles were tested, along with a convergent nozzle modified to minimize screech. Key findings include the effect of heat on shock structure and jet decay, the increase in turbulent velocity when screech is present, and the relative lack of spectral detail associated with the enhanced turbulence.

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