Direct numerical simulation of crossflow instability excited by microscale roughness on HIFiRE-5

Derek J. Dinzl, Graham V. Candler

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

5 Scopus citations

Abstract

Direct numerical simulation is performed on a 38.1% scale HIFiRE-5 forebody to study stationary crossflow instability. Computations use the US3D Navier-Stokes solver to simulate Mach 6 flow at Reynolds numbers of 8.1×106/m and 11.8×106/m, which are conditions used by quiet tunnel experiments at Purdue University. Distributed roughness with point-to-point height variation on the computational grid and maximum heights of 0.5-4.0 µm is used with the intent to emulate smooth-body transition and excite the naturally-occuring most unstable disturbance wavenumber. Disturbance growth rates and wavelength evolution are analyzed, and the effect of roughness height and forcing character is considered. A steady physical mechanism for the sharp increase in wall heat flux seen in both computations and experiment is introduced. Crossflow vortex coalescence is observed and a possible cause is discussed.

Original languageEnglish (US)
Title of host publication54th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103933
StatePublished - Jan 1 2016
Event54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States
Duration: Jan 4 2016Jan 8 2016

Publication series

Name54th AIAA Aerospace Sciences Meeting

Other

Other54th AIAA Aerospace Sciences Meeting, 2016
CountryUnited States
CitySan Diego
Period1/4/161/8/16

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    Dinzl, D. J., & Candler, G. V. (2016). Direct numerical simulation of crossflow instability excited by microscale roughness on HIFiRE-5. In 54th AIAA Aerospace Sciences Meeting (54th AIAA Aerospace Sciences Meeting). American Institute of Aeronautics and Astronautics Inc, AIAA.