采用具有TVD性质的三阶精度Godunov格式，对均匀加载叶型及后部加载叶型所构成的叶栅在不同弯角下的流场进行了数值模拟。详细研究了叶片弯曲后对通道涡截面拓扑结构的影响。发现叶片正弯后有利于使通道涡在结构上变得稳定；同时也指出，与常规叶片相比，二次流损失较小的后部加载叶型所构成的叶栅内的通道涡在结构上较为稳定。本文进一步分析了通道涡结构的改变对损失的影响，并指出使通道涡在结构上变得稳定的边界条件可能有助于减少二次流损失。
Numerical simulation about flow field of bowed blade and aft-loaded blade was carried out with high order N-S solver.The effect of blade bowing on passage vortex topology structure was studied in detail. It is found that the positively curved blade can be benefit to make passage vortex stable.Compared with conventional blade, the passage vortex structure is more stable in cascade with aft-loaded blade which secondary loss is small. This paper also analyzed the effect of change of passage vortex structure on loss and point out that all of the boundary condition which will make passage vortex stale is benefit to decrease secondary loss.
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