涡旋前伸式双叶片污水泵流场分析与性能预测

Study on the Flow within the Impeller of Vortex Forward-extended Double Blade Sewage Pump and Prediction of Its Performance

为研究涡旋前伸式双叶片污水泵流动规律,采用标准k—ε模型和SIMPLEC算法对涡旋前伸式双叶片污水泵叶轮内部流动进行了数值模拟,得出了叶轮内的压力、速度、湍动能的分布情况,从而分析出该型泵叶轮流动的特点和通过能力提高的原因。在流场分析与计算的基础上,提出了性能预测的方法,对规定工况点的性能进行了预测,并分析了预测结果和试验结果差异的原因,从而为评价设计效果提供了有效的手段。

For farther studying the flow of vortex forward-extended double blades pump,the flow field within the impeller was simulated with standard k-εmodel and SIMPLEC algorithm,the characteristics of this kind of flow was analyzed,and the cause for stronger passing-through capabili- ty was found out.Based on the numerical simulation,the performance of the pump was predicted with given method,and the difference between the prediction and test results was analyzed.