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Subsonic Boundary-Layer Wavefront Spectra for a Range of Reynolds Numbers

Smith, Adam E. and Gordeyev, Stanislav and Saxton-Fox, Theresa and McKeon, Beverley (2014) Subsonic Boundary-Layer Wavefront Spectra for a Range of Reynolds Numbers. In: 45th AIAA Plasmadynamics and Lasers Conference, June 16-18, 2014, Atlanta, GA.

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Aero-optic measurements of turbulent boundary layers were performed in wind tunnels at the University of Notre Dame and California Institute of Technology for heated walls at a range of Reynolds numbers. Temporally resolved measurements of wavefronts were collected at a range of Mach numbers between 0.03 and 0.4 and the range of Re_θ between 1,700 and 20,000. Wavefront spectra for both heated and un-heated walls were extracted and compared to demonstrate that wall heating does not noticeably alter the shape of wavefront spectra in the boundary layer. The effect of Reynolds number on the normalized spectra was also presented, and an empirical spectral model was modified to account for Reynolds number dependence. Measurements of OPD_(rms) for heated walls were shown to be consistent with results from prior experiments, and a method of estimating OPD_(rms) and other boundary layer statistics from wavefront measurements of heated-wall boundary layers was demonstrated and discussed.

Item Type:Conference or Workshop Item (Paper)
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Saxton-Fox, Theresa0000-0003-1328-4148
McKeon, Beverley0000-0003-4220-1583
Additional Information:©2014 AIAA. This work is supported by the Air Force Office of Scientific Research, Grant number FA9550-12-1-0060. The U.S. Government is authorized to reproduce and distribute reprints for governmental purposes notwithstanding any copyright notation thereon
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Air Force Office of Scientific Research (AFOSR)FA9550-12-1-0060
Record Number:CaltechAUTHORS:20141107-115405464
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51442
Deposited By: Jamie Sei
Deposited On:07 Nov 2014 23:02
Last Modified:10 Nov 2021 19:10

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