Constrained large-eddy simulation of laminar-turbulent transition in compressible channel flows

被引：1
|
作者：
Chen, Sanmu [1 ,2 ]
Jiang, Zhou [3 ]
Wan, Minping [1 ,2 ]
Chen, Shiyi [1 ,2 ]
机构：
[1] Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Guangdong Prov Key Lab Turbulence Res & Applicat, Shenzhen 518055, Peoples R China
[2] Southern Univ Sci & Technol, Guangdong Hong Kong Macao Joint Lab Data Driven Fl, Shenzhen 518055, Peoples R China
[3] Chongqing Univ, Coll Aerosp Engn, Chongqing 400044, Peoples R China
来源：
ADVANCES IN AERODYNAMICS | 2023年 / 5卷 / 01期
关键词：
Constrained LES; Transition prediction; Compressible channel flow; DIRECT NUMERICAL-SIMULATION; EFFICIENT IMPLEMENTATION; LOCAL VARIABLES; MODEL; DYNAMICS;
D O I：
10.1186/s42774-023-00147-z
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
An improved approach for constrained large-eddy simulations (CLES) of wall-bounded compressible transitional flows is proposed by introducing an intermittency factor. The improved model is tested and validated with compressible channel flows at various Mach numbers and Reynolds numbers that are transitioning from laminar to turbulent states. The improved model is compared against traditional dynamic Smagorinsky model (DSM) and Direct Numerical Simulations (DNS), where the improved model is in better agreement with DNS results than traditional DSM model, in terms of mean velocity profiles, total Reynolds stress and total heat flux. Therefore, the proposed method can be used to accurately predict the temporal laminar-turbulent transition process of compressible wall-bounded flows.
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页数：18
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