非定常固液两相流对双流道泵磨损性能的影响

The Influence of Unsteady Solid-Liquid Two-Phase Flow on the Wear Performance of Double-Channel Pump

基于Mixture多相流模型和RNGκ-ε湍流模型,应用Fluent软件对双流道泵内非定常固液两相流进行了数值模拟,并分析了两相流对双流道泵磨损性能的影响。结果表明:泵的扬程和效率均随时间变化呈现正弦性规律;固相颗粒主要集中在叶轮前、后盖板和蜗壳进口前壁面处;叶轮后盖板中间凸起部位发生严重冲击磨损,其他区域均发生滑动磨损;蜗壳壁面均发生滑动磨损,而隔舌部位发生较为严重的冲击磨损。研究结果可为双流道泵的性能预测和优化提供一定的理论支撑。

The unsteady numerical simulation of solid-liquid two-phase flow in a double-channel pump is carried out using Fluent softwarebased on mixture model and RNG k-ε turbulent model. The influence of two-phase flow on wear performance of the double-channel pump is analyzed deeply. The results show that the pump＇s head and efficiency varies by sine law; Solid-phase particles mainly concentrated on shroud, hub and shroud wall of volute inlet; The raised region of hub center the is impact wear, the abrasive type is sliding wear; The abrasion type on volute wall is sliding wear, but tongue part is serious impact abrasion＇ The research results are conducive of providing theoretical basis of the double channel pump＇s performance prediction and optimization.