超声速来流中横向喷流角度对流动与混合特性的影响

摘要

为了研究喷流角度对超声速来流的影响，利用FLUENT软件，粘性项采用二阶中心差分，对流项采用二阶迎风格式，湍流模型采用标准的k-ε双方程，分别对喷流角度为30°，60°，90°，120°，135°和150°进行了数值模拟。研究发现：随着喷流角度的增大，平板底壁面上分离范围扩大，对称面上弓形激波逐渐增强，总压损失增加，喷流角为135°时混合效率最大。%In order to study the influence of jet angle on the supersonic inflow,by using the FLUENT software,the numerical simulation of injection angles of 30°,60°,90°,120°,135° and 150° was conducted with the second-order central difference for the viscosity term,second order upwind scheme for the advection term and the standard double-equation k-ε for the turbulence model. It is found in the research that with the increase of injection angle,the separation range of the flat bottom area is expanded, the bow shock wave of symmetry plane is enhanced and the total pressure loss is increased,and the mixing efficiency is best when the injection angle is 150°.