超低水头水轮机流动数值模拟及水力性能研究

Research on Flow Numerical Simulation and Hydraulic Performance of Ultra Low-head Water Turbine

为开发经济实用超低水头(净水头低于5m)的水轮机,基于流体动力学理论对可应用于水能、波浪能发电的某超低水头水轮机进行了内部流动数值模拟及性能预测,并分析了水头和转速特性。结果表明,在1.5～5.0m水头范围内,水轮机效率较高,变化平稳,输出功率主要取决于水头。

In order to develop economical and practical ultra low-head turbine（the net head low than 5m）,the internal flow of ultra low-head water turbine with utilization of water and wave energy for generation is simulated by using computational fluid dynamics technology.The efficiency of the entire turbine is predicted and the hydraulic characteristics of the ultra low-head water turbine are analyzed.In the 1.5-5m head range,numerical simulations show that the ultra low-head water turbine has relatively high and slowly changing efficiency,and its output power basically depends on the head.