基于数值模拟的管道离心泵水力性能及能量耗散研究

Research on hydraulic performance and energy dissipation of pipeline centrifugal pump based on numerical simulation

采用雷诺时均的方法,基于SST k-ω湍流模型,开展了管道离心泵能量损失可视化的数值模拟研究。计算结果表明:叶轮内高压主要分布在叶片出口边,蜗壳内压力主要分布在隔舌和出口通道;管道离心泵的能量耗散中脉动熵产占主导地位,设计工况下管道离心泵的能量耗散最低,小流量工况的能量耗散是设计工况的3.4倍,大流量工况的能量耗散是设计工况的2.9倍;叶轮进口边、压力面、出口边以及间隙处能量耗散最大,蜗壳隔舌和出口通道内能量耗散最大。研究成果对同类水泵的低能耗设计提供了参考。

Based on the SST k-ωturbulence model,the numerical simulation of energy loss visualization of pipeline centrifugal pump is carried out by using Reynolds time-averaged method.The calculation results show that the high pressure in the impeller is mainly distributed at the blade outlet,and the pressure in the volute is mainly distributed at the tongue and outlet channel.The pulsation entropy generation is dominant in the energy dissipation of the pipeline centrifugal pump.The energy dissipation of the pipeline centrifugal pump is the lowest under the design condition.The energy dissipation of the small flow condition is 3.4 times that of the design condition,and the energy dissipation of the large flow condition is 2.9 times that of the design condition.The energy dissipation at the inlet edge,pressure surface,outlet edge and tip of the impeller is the largest,and the energy dissipation in the volute tongue and outlet channel is the largest.The research results provide a reference for the low energy consumption design of similar water pumps.