高速旋转圆筒内流场的数值研究

Numerical Study of Flow Field in High-Speed Rotational Cylinder

对于高转速封闭的短圆柱筒而言,其内部流场流动的最高马赫数达到了7左右,这时流场平衡时的状态是一个非常重要而在一些工程中又急需解决的问题。本工作利用数值分析法,采用柱坐标系、二阶迎风格式、总能守恒模型,对封闭状态下高速旋转的短圆柱筒内的流场进行了三维数值研究。研究结果表明,只有在一定的计算条件下,数值计算才能得到物理解。而在能得到物理解的情况下,流场平衡时基本保持刚体旋转状态。

For a closed short cylinder in a high-speed rotational condition,the max.Mach number reaches about 7 in the flow field.The equilibrium state of the flow field in this condition is a very important problem,which requires to be solved inevitably in some engineering.A method of numerical analysis was used in this study.A cylindrical coordinate system,a second-order upwind scheme,and the total energy model were also employed.The flow field of a short cylinder in closed and high-speed rotational condition was studied by 3D numerical method.The preliminary study shows that physical results can be obtained only in certain computing condition.In this case,the flow field of the short cylinder in closed and high-speed rotational condition is able to maintain rigid body rotational state when it reaches equilibrium state.