圆锥低超声速有攻角绕流非对称涡流的数值模拟与非线性分岔的研究

本文用数值方法研究了圆锥低超声速有攻角绕流的对称和非对称定常解，扰动响应以及在更大角时出现的准周期解问题。

Numerical Simulation and Bifurcation Investigations on the Symmetry/Asymmetry Vortex Flows over a Cone at Angles of Attack for Low Mach Numbers

An efficient finite difference Navier Stokes solver is used to study the natural occurrence of symmetry/asymmetry steady separated flows,the response of the disturbances and the temporarily periodic solutions at high incidences in this paper.The study documents that the steady symmetric solution is structure stable at low incidence.When the angle of attack is increase up to one critical value,the symmetric state would lose its stability,and change into the asymmetric state which is structure stable.With further increasing,the steady asymmetric flow becomes unstable,the secondary bifurcation occurs,which led to temporal periodic state emanates from stationary state.This is kown as Hopf bifurcation.Structure stability is the main mechanism of the above transition.