Open AccessInvestigation on the depth effects of the micro-grooves on the suppression of the second modes in the hypersonic boundary layer
Author(s) -
Qilong Guo,
Chen Li,
Guohua Tu,
Jianqiang Chen,
Baikun Wan,
Yong Liu
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1786/1/012053
Subject(s) - hypersonic speed , mach number , boundary layer , groove (engineering) , instability , boundary (topology) , reflection (computer programming) , mechanics , materials science , layer (electronics) , work (physics) , optics , acoustics , aerospace engineering , physics , computer science , engineering , mathematics , mathematical analysis , composite material , thermodynamics , programming language , metallurgy
The transition of the hypersonic boundary layer and the corresponding control have been extensively interested since the strong engineer background. In the present work, a hypersonic boundary layer over a flat plate of Mach 6 is computed using the high-order finite-difference scheme. The influences of the two-dimensional micro-grooves on the evolution of the second-mode instability wave are investigated. The comparison is carried out between different depths of the micro-groove. The results indicate that the actual control effect does not significantly vary with the depths under the condition with large grooves. The DNS prediction show different results with the theoretical model for the acoustic reflection coefficient. It is suggested that new model should be derived to guide the design and optimize of the parameters of the micro-groove.