【摘要】 利用计算流体力学软件Fluent对低比转速离心泵叶轮内的三维流动进行了数值模拟,不同工况下模拟所得到的结果与实际情况非常吻合。通过对压力场的分析提出了判断叶轮内是否发生空化初生和计算水泵必需空化余量△hr的简洁方法;通过对速度场的分析,从另外一个角度印证了加大流量的设计方法。同时也为分析水泵性能、优选设计方案,提供了一个可靠的途径。更多还原

【Abstract】 This paper has carried on a numerical simulation to the three dimensional flow inside the low-specific-speed centrifugal pump impeller by using the computation hydromechanics software Fluent.The simulation results under different operating modes are very identical with the actual situations.Through the analysis of the pressure field,the authors proposed a succinct method for the judgment of whether there is a new cavitation on the impeller and the way to compute the essential cavitation remainder △hr.Through the analysis of the velocity field,it confirmed the design method of enlarging flow rate from another angle.At the same time it also provides a reliable way for analyzing the water pump′s performance and the optimal design plan.更多还原