The effect of vortex generators on shock-induced boundary layer separation in a transonic convex-corner flow

Kung Ming Chung, Kao Chun Su, Keh Chin Chang

研究成果: Article同行評審

15 引文 斯高帕斯(Scopus)

摘要

Deflected control surfaces can be used as variable camber control in different flight conditions, and a convex corner resembles a simplified configuration for the upper surface. This experimental study determines the presence of passive vortex generators, VGs (counter-rotating vane type), on shock-induced boundary layer separation for transonic convex-corner flow. The mean surface pressure distributions in the presence of VGs for h/δ = 0.2 and 0.5 are similar to those for no flow control. If h/δ = 1.0 and 1.5, there is an increase in the amplitude of the mean surface pressure upstream of the corner’s apex, which corresponds to greater device drag and less downstream expansion. There is a decrease in peak pressure fluctuations as the value of h/δ increases, because there is a decrease in separation length and the frequency of shock oscillation. The effectiveness of VGs also depends on the freestream Mach number. For M = 0.89, there is an extension in the low-pressure region downstream of a convex corner, because there is greater convection and induced streamwise vorticity. VGs with h/δ ≤ 0.5 are preferred if deflected control surfaces are used to produce lift.

原文English
文章編號157
期刊Aerospace
8
發行號6
DOIs
出版狀態Published - 2021 6月

All Science Journal Classification (ASJC) codes

  • 航空工程

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