中文摘要：

本文针对非稳态问题对IDEAL算法与PISO算法的计算效率展开对比研究,并以顶盖驱动流为数值算例,考察了雷诺数、时间步长和网格数的影响。数值计算结果表明：IDEAL算法与PISO算法各有优缺点,求解强非线性非稳态压力-速度耦合问题且精度要求较高时建议采用IDEAL算法。

英文摘要：

In this paper,the computational efficiency of IDEAL and PISO algorithms is compared by calculating the unsteady-state lid-driven cavity flow with the influence of different Reynolds number,time step and grid number on efficiency taken into consideration.The calculation results indicate that IDEAL and PISO algorithms have their own advantages,and it is better to use IDEAL algorithm to solve strong nonlinear velocity-pressure problems with high accuracy required.