基于fluent对多级离心泵首级的数值模拟

为了解叶轮叶片数对多级离心泵水利性能的影响，基于κ-ε湍流模型，采用SIMPLEC算法，利用Navier-Stokes时均化方程，对仅改变叶轮叶片数的某多级离心泵首级进行数值模拟。通过fluent数值计算得到泵内的压力，速度流场分布，对其进行分析，得出首级叶轮叶片数为六片时，此多级离心泵的内部流场压力及速度分布最均匀。同时利用fluent的后处理结果对此泵进行性能预测，得出叶轮叶片为六片时，泵的效率达到最高值70.68%。

Based on fluent for the numerical simulation of multistage centrifugal pump’frist phase

For understanding the number of impeller’blades make effect on the performance of multistage centrifugal pump，based on κ-ε turbulence model，Using SIMPLEC algorithm and the Navier - Stokes homogenization equation, to simulate a multistage centrifugal pump’s phase ,which just change the number of impeller blades. By fluent numerical calculation,can obtaine the pump internal pressure and velocity field distribution. To analyze it, when the number of impeller blade is 6, The internal flow field ,in the multistage centrifugal pump ,has the most uniform pressure and velocity distribution. At the same time, using fluent post-processing results for performance prediction of this pump, Concludes that when the impeller blade is 6, the pump’s efficiency reach to maximum 70.68%.