切线泵整机多相位定常流动数值模拟

本文对一单级切线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泵的扬程、叶轮流道内的质量流量、速度场、压力场的变化规律。计算表明,切线泵内流场非常复杂,整机多相位定常流动数值模拟的结果实际上是泵内流场非定常特性在定常计算中的反映,其内部流动呈周期性变化,叶轮流道在不同的位置流动情况差别很大。本次计算为进一步提高切线泵性能、减少水力损失提供了一定的理论依据。

NUMERICAL ANALYSIS OF FLOW FEATURES FOR A TANGENT PUMP WITH MULTI-PHASE POSITION

The numerical analysis of the inner flow field is presented, at the design point for a single stage tangent pump with multi-phase position. The changes of the total head rise, the mass rate of the passage in the impeller, the velocity and the pressure fields have been investigated in detail, due to the position of impeller passage with respect to volute. It can be concluded that the flow field in the volute pump is very complicated, and the result of steady numerical analysis with multi-phase position for it is the same as the unsteady features in a certain degree; further more the flow in it changes periodically, and there exists a remarkable difference of flow features between passages at various position. All results show the analysis is very important and available for improving the performance, reducing the hydraulic loss, and others.