超声速立方体绕流数值模拟

Numerical Simulation of Supersonic Flow Past Cube

为了提高对超声速钝体绕流过程激波结构以及尾流变化的认识,该文利用自适应网格加密(AMR)方法与AUSMDV格式,实现了Euler方程的数值求解。对典型二维前台阶激波反射算例的验证结果显示了AMR法的优越性。将结果应用于马赫数分别为Ma=3.0,2.0时的立方体绕流数值研究,结果显示了不同超声速来流条件下立方体头部弓形激波的变化和立方体尾流涡街的发展过程。

To improve the understanding of the shock wave structure and the modification of the wake flow for the supersonic flow past a bluff body,the adaptive mesh refinement（AMR） method and the AUSMDV scheme are employed to achieve the numerical solutions of Euler equations.A benchmark example of forward facing step is chosen as a validation example.The merits of using the AMR are proved with the comparison of the results here to those in previous literatures.A three-dimensional supersonic flow at different Mach numbers,Ma=3.0,2.0,past a cube is numerically investigated.The results show the variations of bow shock waves in front of the cube and the development processes of the vortex street behind the cube under different Mach numbers.