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为了诊断可逆转轮的三维流场,引入局部涡动力学诊断方法,从叶片对流体做功能力分析过流部件的设计状况。通过对沿流线的截面上总压流的分解,找到对总压流产生不良影响的动力学根源和位置。根据诊断结果,通过在设计中改变叶片的环量分布,对可逆转轮进行了改进,提高了转轮的效率和气蚀性能。可逆转轮数值实验结果表明:在水泵工况,改进前后的转轮效率分别为91.3%和92.1%;在水轮机工况,改进前后的转轮效率分别为91.9%和92.4%;改进后气蚀因数降低了0.012。
In order to diagnose the three-dimensional flow field of the reversible wheel, a local eddy dynamics diagnostic method is introduced to analyze the design of the overcurrent component from the fluid on the blade. By decomposing the total pressure flow along the cross section of the streamline, we find the source and location of the kinetics that have an adverse effect on the total pressure flow. According to the diagnosis results, the reversible wheel is improved by changing the distribution of the ring volume in the design, which improves the efficiency and cavitation performance of the wheel. The reversible rotor numerical results show that the efficiency of the runner before and after the improvement is 91.3% and 92.1% respectively in the condition of the pump; in the condition of the turbine, the runner efficiency before and after the improvement is 91.9% and 92.4% respectively; the improved cavitation Factor decreased by 0.012.