Stabilization of the hypersonic boundary layer by finite-amplitude streaks
2016 (English)In: Physics of fluids, ISSN 1070-6631, E-ISSN 1089-7666, Vol. 28, no 2, 024110Article in journal (Refereed) PublishedText
Stabilization of two-dimensional disturbances in hypersonic boundary layer flows by finite-amplitude streaks is investigated using nonlinear parabolized stability equations. The boundary-layer flows at Mach numbers 4.5 and 6.0 are studied in which both first and second modes are supported. The streaks considered here are driven either by the so-called optimal perturbations (Klebanoff-type) or the centrifugal instability (Gortler-type). When the streak amplitude is in an appropriate range, i.e., large enough to modulate the laminar boundary layer but low enough to not trigger secondary instability, both first and second modes can effectively be suppressed. (C) 2016 AIP Publishing LLC.
Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2016. Vol. 28, no 2, 024110
IdentifiersURN: urn:nbn:se:kth:diva-184977DOI: 10.1063/1.4941989ISI: 000371286500041ScopusID: 2-s2.0-84960917770OAI: oai:DiVA.org:kth-184977DiVA: diva2:917795
QC 201604072016-04-072016-04-072016-04-07Bibliographically approved