Subsonic boundary-layer Wavefront spectra for a range of Reynolds numbers

Adam E. Smith, Stanislav Gordeyev, Theresa Saxton-Fox, Beverley McKeon

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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 Reθ 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 OPDrms for heated walls were shown to be consistent with results from prior experiments, and a method of estimating OPDrms and other boundary layer statistics from wavefront measurements of heated-wall boundary layers was demonstrated and discussed.

Original languageEnglish (US)
Title of host publication45th AIAA Plasmadynamics and Lasers Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624102905
StatePublished - Jan 1 2014
Externally publishedYes
Event45th AIAA Plasmadynamics and Lasers Conference 2014 - Atlanta, GA, United States
Duration: Jun 16 2014Jun 20 2014

Publication series

Name45th AIAA Plasmadynamics and Lasers Conference


Other45th AIAA Plasmadynamics and Lasers Conference 2014
Country/TerritoryUnited States
CityAtlanta, GA

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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