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近年来，叶片弯曲在叶轮机械中得到厂越来越广泛的应用。众所周知，合适的周向弯曲或轴向弯曲能够提高叶轮机械的气动性能。但什么样的弯曲规律最好则取决于叶片的负荷与工况。本文试图通过对某大功率汽轮机未级导叶及其弯曲变形的气动计算与分析，深人探讨特定工况下不同弯曲规律对叶片气动性能的影响。文中采用有限体积时问推进法并结合多重网格法求解Ｎ－Ｓ方程，给出了不同弯曲叶型的流场和总体性能比较，详细分析并讨论了计算结果。
In recent years, blade bending in the impeller machinery has been more and more widely used plants. It is well-known that suitable circumferential bending or axial bending can improve the aerodynamic performance of the impeller. But what kind of bending law is best depends on the blade load and conditions. In this paper, the aerodynamic performance of blades of a high-power steam turbine is studied through the aerodynamic calculation and analysis of an unvarying guide vane and its bending deformation. In this paper, the finite volume time-delay method and the multi-grid method are used to solve the N-S equation. The flow field and overall performance comparison of different curved leaves are given. The calculation results are discussed and discussed in detail.