【摘要】 与SIMPLE算法比较 ,PISO算法有其计算非定常流动的优势。本文针对非交错网格下PISO算法提出改进 ,简化其求解过程 ,使其计算步骤统一。斯托克斯第二问题计算结果比较 ,说明在非交错网格下改进后PISO算法比SIMPLE算法更适宜于非定常流动的计算 ,并可应用于叶轮机械内部动静耦合非定常流动的数值求解中更多还原

【Abstract】 PISO algorithm, as one of the pressure-based schemes, was discussed under staggered and non-staggered grid systems. To apply it in non-staggered grid system easily, an improved PISO algorithm was developed. Compared to the SIMPLE algorithm, the improved PISO algorithm is superior in the simulation of unsteady flow. The computation results of the Stokes II problems prove the fact. In addition, the algorithm can be used to calculate unsteady flow field due to rotor/stator interaction in turbomachinery.更多还原