Comparison of aero-optic distortion in hypersonic and transonic, turbulent boundary layers with gas injection

Christopher M. Wyckham, Alexander J. Smits

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

1 Scopus citations

Abstract

A Shack-Hartmann wavefront sensor is optimized for the study of aero-optic distortion in turbulent boundary layers at transonic and hypersonic flows. An extensive database of wavefronts, collected under a variety of flow conditions, with and without gas injection into the boundary layer, is examined. The Large Scale Motions of the outer boundary layer are found to be the aero-optically dominant structures, the Large Aperture Approximation is validated, and a new scaling argument for the rms phase distortion is proposed. The use of a combination of helium injection and low temporal bandwidth adaptive optics for the mitigation of aero-optic distortions is also evaluated and shown to be useful only if helium injection is already required for window cooling.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 37th AIAA Plasmadynamics and Lasers Conference
Pages208-227
Number of pages20
StatePublished - Dec 18 2006
Event37th AIAA Plasmadynamics and Lasers Conference - San Francisco, CA, United States
Duration: Jun 5 2006Jun 8 2006

Publication series

NameCollection of Technical Papers - 37th AIAA Plasmadynamics and Lasers Conference
Volume1

Other

Other37th AIAA Plasmadynamics and Lasers Conference
CountryUnited States
CitySan Francisco, CA
Period6/5/066/8/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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