离心泵叶轮内部湍流流动的数值计算及试验

NUMERICAL SIMULATION AND EXPERIMENT STUDY FOR TURBULENT FLOW IN THE IMPELLER OF CENTRIFUGAL PUMP

对IH65型离心泵叶轮内部流动进行研究,基于Reynolds时均化的N-S方程和标准的κ-ε两方程湍流模型,运用流场计算软件Fluent,计算该泵叶轮在不同工况下的内部流场,并将计算结果与粒子图像测速仪(PIV)实测结果进行比较。在对该泵叶轮内部流速分布、压力分布以及试验得到的流动撞击、二次流、回流等现象分析的基础上,提出设计上的一些改进措施,为该型泵叶轮优化设计及其内部两相流动研究提供参考。

The internal flow between the impellers of IH65 centrifugal pump is investigated. Based on the Reynolds-averaging N-S equations and standard k-ε two-equation turbulent model, the simulations of turbulent flow between the impellers are performed by using the flow computing software Fluent under different operating conditions. The calculation results are compared with the experimental data by particle image velocimeter （PIV）. Based on the analysis of the calculated results of velocity and pressure profiles in the centrifugal pump and experimentally observed phenomenon of flow impact, secondary flow and recirculation, some design improvements are proposed, which give suggestions on the optimal design and internal two-phase flow study of the centrifugal pump.