Transition triggered by isolated roughness element
Hypersonic flow transition from laminar to turbulent triggered by an isolated roughness element is investigated using advanced RANS/LES hybrid model. It is called as IDDES methods (Improved Delayed Detached Eddy Simulation), which combines DDES and WMLES (wall-modeled large eddy simulation). To explore the transition mechanism and capture the shock wave at the same time, the spatial scheme of Navier-Stokes equations is dexterously designed with adaptive dissipation, where the original dissipation is applied near the wall, the shock wave and irrotational region and the scheme becomes almost zero dissipation in the separation region after the roughness element. From the preliminary results, IDDES with adaptive dissipation can successfully simulate the boundary layer transition triggered by a diamond-shape roughness element.
transition isolated roughness IDDES
Zhiwei Duan Zhixiang Xiao Song Fu
School of Aerospace, Tsinghua University, Beijing, P. R. China, 100084
国际会议
The 8th Sino-Russia High-speed Flow Conference(第八届中俄高超声速流体力学研讨会)
上海
英文
290-299
2011-11-21（万方平台首次上网日期，不代表论文的发表时间）