细长锥体有攻角绕流的非对称分岔及其涡结构的数值模拟

Numerical Simulation of Asymmetric Separated Flows About Slender at Incidence in a Supersonic Stream

本文用ＮＮＤ格式计算了具有复杂涡结构的细长锥体有攻角绕流问题，着重研究了非对称分离的分岔现象以及分岔前后涡结构的演变，数值计算结果表明，大约在ａ／（２β）≈１．０时，Ｎ－Ｓ方程出现分岔解，同时还给出了分岔前后涡结构及物理量分布的特征。

Steady asymmetric vortical flows around slender bodies at high incidences are solved using the unsteady,compressible, locally conical N-S equations, NND scheme is used for the numerical computation.。The bifurcation phenomena of the asymmetric separation and the evolution of vortical structurc are studied.Numerical investigation indicates that when a/(2β)=1.0,the bifurcation solution naturally occur during the calculation. The vortical structure before and after the bifurcation and the sideforce coefficients which agree with the experiments are given.