多重网格法求解叶轮机械不可压流动

提出了一种新的适于不可压缩流动有限体积差分计算的多重网格法。将之与叶轮机械不可压缩流动有限体积差分格式相结合,并使用英国剑桥大学Denton教授的“粘性体积力”法来模拟粘性对流动的影响,对一低稠度导轮泵内部流场的计算表明,作者的多重网格法的计算结果十分接近,且该计算法的收敛速度是DentonJD计算法的两倍以上。

A Multi-grid Scheme for the Solution of Incompressible Flows in Turbomachinery

Proposed is a new multi grid scheme suitable for calculating incompressible flows in turbomachinery. The proposed method can be combined with the finite volume difference scheme used for computing three dimensional incompressible viscous flows in turbomachinery. In addition, the "viscous volume force" method proposed by Professor Denton of British Cambridge University is employed to simulate the effect of viscosity on flows. Through the calculation of the internal flow field of a low solidity inducer it can be shown that the two sets of results obtained by using the multi grid scheme proposed respectively by the authors and by Professor Denton are in very good agreement. Furthermore, the converging speed realized under the authors' method is more than two times that of Professor Denton's one.