Direct numerical simulation of stability of a supersonic mixing layer flow
Linear and nonlinear issue of a mixing layer at Mc=1.2 are studied with a DNS method. Navier-Stokes equations in perturbation form are solved with a finite difference method of the third order accuracy. An approximated boundary condition treatment of small disturbance along the outside boundary is proposed on ow characteristics. This boundary condition is verified to be valid in the numerical case. Linear issue of a mixing layer at Mc=1.2 is simulated. Three modes of instability in the mixing layer have been simulated which are Slow-Mode, Fast-Mode and Mix-Mode. Nonlinear issue pf the mixing layer at Mc=1.2 is also studied. The mode transition of the mixing layer instability is simulated. K-type and H-type secondary instability in supersonic shear layer at Mc=0.5 are simulated.
supersonic mixing layer DNS boundary condition acoustic radiation vortex mod secondary instability
Q.Shen F.M.Guan F.G.Zhuang Q.Wang
China Academy of Aerospace Aerodynamic, Beijing 100074, China
国际会议
The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)
上海
英文
2007-08-15（万方平台首次上网日期，不代表论文的发表时间）