高速复合叶轮离心泵多相位定常流动数值模拟

对一高速复合叶轮离心泵在设计工况进行了多相位定常流动数值模拟,分析了由于叶轮与蜗壳相对位置的变化引起的离心泵的速度场、压力场、扬程系数和效率的变化规律。计算表明,高速复合叶轮离心泵内流场非常复杂,叶轮流道在不同位置的流动情况差别较大,而扬程系数呈周期性变化。该计算为进一步提高高速复合叶轮离心泵的性能、减少水力损失提供了一定的理论依据。

Numerical analysis of flow features of a high-speed centrifugal pump with a complex impeller with multi-phase position

The numerical analysis of the inner flow field is presented at the design point for a high-speed centrifugal pump with a complex impeller with multi-phase position. The changes of the velocity and the pressure fields, the total head rise coefficient and the efficiency due to the positions of impeller passage with respect to volute have been investigated in detail. It can be concluded that the flow field in the high-speed centrifugal pump with a complex impeller is very complicated, and there exists an obvious difference of flow features at various positions of passages, the total head rise coefficient changes periodically. All results show the analysis is very important and available for improving the performance, reducing the hydraulic loss, and others.