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中文摘要：
为了研究采用对旋转轮的新型轴流式水轮机的非定常性能，应用三维非定常数值计算方法，对该新型水轮机进行了数值模拟研究。数值计算中，采用了全三维全流道的数值计算方法，基于DES（Detached Eddy Simulation）方法获得了对旋轴流水轮机的非定常流场和能量性能。计算结果显示，该新型水轮机在一个转动周期的不同时刻，其内部流场存在显著的非定常特性。
英文摘要：
In order to study the unsteady performance of a new type Kaplan turbine witn contra- rotating runner, the 3D unsteady numerical method was applied to the simulation of the new turbine. During the numerical simulation turbulence model of detached eddy simulation was used to simulate the unsteady flow field of the new turbine then the energy performance of the turbine was discussed. According to the simulation results in the different time of a rotating period there is obvious unsteady performance in the internal flow field of the new turbine.
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