摘要
提出了一种求解叶栅内部粘性流场的新方法，并用该方法求解了任意曲线坐标系下的时间相关Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程．该方法采用有限体积离散，对无粘通量采用Ｃｈａｋｒａｖａｒｔｈｙ－Ｏｓｈｅｒ的三阶精度ＴＶＤ格式．对粘性通量采用中心差分格式；并且在边界处理上采用直接将边界条件施加于物理边界上的方法，使得边界条件更加符合真实情况．对叶栅内部粘性流场的计算表明，该方法能够反映叶栅内部的流动情况．
In this paper,we propose a new method to calculate the flow field in turbomachinery.We calculate the time-marching N.S.equation in the general curvilinear coordinate by using this method.In this method,we use the finite volume scheme and for inviscous flow flux we use Chakravarthy-Osher third order TVD scheme and for viscous flow flux we use the central difference scheme.We directly propose the boundary condition on the physical boundary and thus the boundary condition is similar to the real situation.Through the calculation of viscous flow,we find that this method can reflex the flow situation in turbomachinery.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
1998年第5期17-22,共6页
Journal of Harbin Engineering University
关键词
粘性流场
数值模拟
边界条件
viscous flow field
numerical simulation
boundary condition
