离心泵径向导叶正叶片参数的优化设计

针对工业生产中常见的节段式多级泵径向导叶和叶轮匹配程度较低的问题,该文借鉴面积比原理,利用数学关系给出了径向导叶正叶片参数确定的新方法。基于FLUENT软件,采用标准k-ε模型、SIMPLEC算法对径向导叶式离心泵单级叶轮与导叶进行了数值验证。结果表明:导叶喉部面积对离心泵性能影响重大,Anderson的面积比系数对导叶式离心泵偏大;正导叶参数的优化设计能提高离心泵的效率,该文设计的最优模型相比传统方法设计的模型,设计工况下扬程提高2.3m,效率提高1.6%,优化设计有效。该研究可为节段式多级泵的水力优化提供参考。

Optimal design on parameters of guide vane of radial diffusers in centrifugal pump

Segment multistage pumps are widely used in industry, and their radical diffusers are always low in matching the impellers. This paper borrows lessons from the area ratio theory and puts forward a new method to determine the parameters of the guide vane of radial diffusers through the mathematic relation. Based on FLUENT software, numerical investigation is carried on the pump with radial diffusers using the standard model and the SIMPLEC algorithm. The result shows the throat area influences the pump performance greatly, and the area ratio Anderson advised is bigger than it should be. The optimal design on the guide vane can increases the efficiency of the pumps, the best model designed in the paper is 2.3 m higher in head and 1.6% higher in efficiency than the ones designed in traditional ways. Therefore the optimal design is effective. The research results can provide a theoretical reference for hydraulic optimization of segment multistage pumps.