基于MOP的低比转速离心泵优化设计研究  

Optimal design study of low specific speed centrifugal pump based on MOP

作　　者：魏杰 邵春雷[1] 龚兴 WEI Jie;SHAO Chunlei;GONG Xing(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]南京工业大学机械与动力工程学院,南京211816

出　　处：《流体机械》2024年第8期61-69,82,共10页Fluid Machinery

基　　金：国家自然科学基金项目(51306087);江苏省自然科学基金面上项目(BK20191361);江苏省研究生科研与实践创新计划项目(SJCX21_0493)。

摘　　要：针对传统低比转速离心泵效率偏低的问题,提出一种实现低比转速离心泵快速和智能化优化方法。以IS 80-50-250型低比转速离心泵为研究对象,采用叶轮机械设计软件CFturbo提取叶轮子午流道和叶片型线控制点参数;利用最佳预测元模型(MOP)和梯度算法得到优化后的参数和三维模型;对优化前、后的水力模型进行CFD数值计算,通过试验验证了数值计算的准确性,并分析优化前、后水力模型性能和流态,验证了优化方法的可行性。结果表明:在设计工况下,通过优化方法得到优化泵的效率与数值计算得到的效率高度一致,说明该方法可以实现离心泵的优化设计,优化后泵的效率提升了2.86%,扬程提高了2.08 m,优化效果较为显著,且优化后泵内部流动得到了较为明显的改善。研究结果对提高离心泵的水力性能具有借鉴意义。For the low efficiency problem of the traditional low specific speed centrifugal pump,an automatic optimization method was proposed to realize the fast and intelligent optimization of the low specific speed centrifugal pump.Firstly,IS 80-50-250 low specific speed centrifugal pump was used as the research object,and the turbine-machine design software Cfturbo was used to extract the control point parameters of the impeller meridian channel and blade profile.Secondly,Metamodel of Optimal prognosis(MOP)model and gradient algorithm were used to obtain the optimized parameters and the three-dimensional model.Finally,CFD numerical calculations were conducted on the hydraulic model before and after optimization,and the accuracy of the numerical calculations was verified through experiments,the performance and flow state of the hydraulic model before and after optimization were analyzed,and the feasibility of the optimization method was verified.The research results show that under the design condition,the efficiency of the optimized pump obtained by the optimization method is highly consistent with that obtained by the numerical calculation,indicating that this method can realize the optimal design of the centrifugal pump,the efficiency of the optimized pump is increased by 2.86%,the head is increased by 2.08 m,the optimization effect is relatively significant,and the internal flow of the optimized pump is significantly improved.The research method in this study has reference significance for improving the hydraulic performance of centrifugal pumps.

关 键 词：低比转速离心泵 最佳预测元模型 智能优化 计算流体动力学 

分 类 号：TH3[机械工程—机械制造及自动化]