Investigations of the influence of slots spacing and depth on second mode disturbances in hypersonic boundary layer

S. V. Lukashevich, S. O. Morozov, A. N. Shiplyuk

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1 Citation (Scopus)

Abstract

Experimental investigations of the influence of coating consist of streamwise slots with different spacing and depth on second mode disturbances in hypersonic boundary layer of the sharp cone at Mach number M8 = 5.8 are conducted. The experiments show that the second mode disturbances are dumped on the surfaces with slots. It is found out that the maximum amplitude of the second mode versus depth has the nonmonotonic dependence. Minimum of the second mode disturbances amplitude are found for depth h = 0.6 mm for the coatings with slots width w = 0.2 mm and spacing b = 0.4 and 0.8 mm. The coatings consists slots with spacing b = 0.4 mm suppress disturbances better than coatings with b = 1.8 mm. Maximum of the disturbances growth rate on the surface with slots are shifted to the lower frequency. It is shown that surfaces consisting of streamwise slots effectively stabilizes the second mode disturbances, which is the most unstable in the hypersonic boundary layer, and destabilizes perturbations with lower frequencies related to the first mode disturbances.

Original languageEnglish
Title of host publication19th International Conference on the Methods of Aerophysical Research, ICMAR 2018
Editors Fomin
PublisherAmerican Institute of Physics Inc.
Number of pages4
Volume2027
ISBN (Electronic)9780735417472
DOIs
Publication statusPublished - 2 Nov 2018
Event19th International Conference on the Methods of Aerophysical Research, ICMAR 2018 - Akademgorodok, Novosibirsk, Russian Federation
Duration: 13 Aug 201819 Aug 2018

Publication series

NameAIP Conference Proceedings
PublisherAMER INST PHYSICS
Volume2027
ISSN (Print)0094-243X

Conference

Conference19th International Conference on the Methods of Aerophysical Research, ICMAR 2018
CountryRussian Federation
CityAkademgorodok, Novosibirsk
Period13.08.201819.08.2018

Keywords

  • STABILIZATION

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