Study on turbulence drag reduction of riblet plate in hypersonic turbulent flows

Hao Zhou, Xinliang Li and Changping Yu
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Hao Zhou: LHD, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, P. R. China2School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Xinliang Li: LHD, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, P. R. China2School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Changping Yu: LHD, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, P. R. China2School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, P. R. China

International Journal of Modern Physics C (IJMPC), 2020, vol. 31, issue 03, 1-11

Abstract: This paper focuses on turbulence drag reduction of riblet plate in hypersonic turbulent flows. We use direct numerical simulation (DNS) and large eddy simulation (LES) to simulate three-dimensional spatially-developing boundary layer over the flat plate and riblet plate with a free-stream Mach number Ma=6. The results reveal the influence of different riblet heights hw and riblet distances λw on drag reduction effect. The drag reduction effect increases with the increase of riblet height and the decrease of riblet distance within suitable range of parameter values. Through analysis, it can be seen that the riblet plate affects the turbulent contribution of the skin friction by suppressing or destroying the large-scale vortex structure. Combined with the actual engineering design requirements, we can use the riblet plate with appropriate parameters to achieve the purpose of turbulence control.

Keywords: Hypersonic; turbulence control; numerical simulation; riblet plate (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1142/S0129183120500461

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