Improved-Delayed-Detached-Eddy Simulation of cavity-induced transition in hypersonic boundary layer》.pdf
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Improved-Delayed-Detached-Eddy Simulation of cavity-induced transition in hypersonic boundary layer》.pdf
International Journal of Heat and Fluid Flow 51 (2015) 138–150
Contents lists available at ScienceDirect
International Journal of Heat and Fluid Flow
journal homepage: /locate/ijhff
Improved-Delayed-Detached-Eddy Simulation of cavity-induced
transition in hypersonic boundary layer
Lianghua Xiao, Zhixiang Xiao, Zhiwei Duan, Song Fu ⇑
School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
a r t i c l e i n f o a b s t r a c t
Article history: Hypersonic flow transition from laminar to turbulent due to the surface irregularities, like local cavities,
Available online 28 October 2014 can greatly affect the surface heating and skin friction. In this work, the hypersonic flows over a three-
dimensional rectangular cavity with length-to-width-to-depth ratio, L :W:D, of 19.9:3.57:1 at two angles
Dedicate this article to Professor B.E.
Launder and Professor K. Hanjalic who have of attack (AoA) were numerically studied with Improved-Delayed-Detached-Eddy Simulation (IDDES)
constantly encouraged my research and method to highlight the mechanism of transition triggered by the cavity. The present approach was firstly
academic career. applied to the transonic flow over M219 rectangular cavity. The results, including the fluctuating pressure
and frequency, agreed with experiment well. In the hypersonic case at Mach number about 9.6 the cavity
Keywords: is seen as ‘‘open’’ at AoA of 10 but ‘‘closed’’ at AoA of 15 unconventional to the
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