中文摘要：

目前波能发电装置中应用最为广泛的是振荡水柱式，具有导流叶片的冲击式透平因其峰值效率高．启动性能好等优点而受到越来越多的重视。采用计算流体力学软件Fluent6．2的三维数值模拟技术对该种透平装置进行了研究。控制方程为雷诺平均方程，并利用重整化群RNG湍流模型闭合方程组。数值计算结果与试验值较为吻合，说明该方法有效可靠。考察了网格类型及网格数对计算结果的影响，研究了在不同径间比条件下，动叶片表面的压力分布情况，计算了径间比在不同流量系数范围内对输入系数、扭矩系数及透平效率的影响。对动叶片表面空气流动迹线分布进行了考察。根据以上研究结果，对不同流量系数下透平径间比的设计取值提出了建议。

英文摘要：

The oscillating water column plants are widely applied in wave energy conversion. The impulse turbine with fixed guide vanes has newly been proposed because of the higher peak efficiency and better starting characteristics. The three dimensional numerical simulation is used to investigate this type of turbine. The governing equations are Reynolds average equations, using the RNG turbulence model. The calculating results show good agreements with the experimental value, which demonstrates the validity and reliability of the method in this paper. The effects of types and number of grid are presented, and the pressure distribution, input coefficient, torque coefficient and turbine efficiency under various gap to chord ratio are investigated. The paper gives the optimum design geometry of the impulse turbine under different flow coefficients.