基于正交试验的缝隙引流叶轮优化设计  

Optimization design of the gap drainage impeller based on orthogonal experiment

作　　者：黄彬彬 张扬 张文斌 HUANG Binbin;ZHANG Yang;ZHANG Wenbin(Shanghai Marine Equipment Research Institute,Shanghai 200031,China)

机构地区：[1]上海船舶设备研究所,上海200031

出　　处：《流体机械》2024年第4期74-80,共7页Fluid Machinery

摘　　要：为探究不同参数下缝隙引流叶轮对离心泵性能的影响,采用正交试验方法,以某型两级离心泵为研究对象,根据L_(6)(2^(1)×3^(2))正交表,选取小叶片包角、小叶片周向重叠度、缝隙宽度等3个参数作为试验因素,设计出6种叶轮。基于SST k-ω湍流模型对离心泵内部流场开展了数值计算工作,获得了各方案在不同工况下的性能曲线。采用极差分析法,探究了不同因素对扬程和效率的影响。对优化叶轮方案进行试验,获得泵试验性能曲线。结果表明,小叶片周向重叠度和缝隙宽度对扬程和效率影响较大,小叶片能有效改善两级叶轮内部的流动结构;采用优化叶轮方案后,离心泵额定点扬程增加2.3%,效率提高0.86%。对缝隙引流叶轮进行优化设计可有效提高泵性能。A two-stage centrifugal pump was used as the research object by using the orthogonal test method to discuss the influence of the gap drainage impeller on the performance of centrifugal pump under different parameters.According to the L_(6)(2^(1)×3^(2)) orthogonal experimental design table,three parameters such as the wrap angle and circumferential overlap of the small blade,and the gap width were selected as the experimental factors,and six types of impellers were designed.The internal flow field in the centrifugal pump was numerically calculated based on SST k-ω turbulent model.The performance curves under different working conditions were obtained.The range analysis method was used to explore the effects of different factors on head and efficiency.The better optimized impeller scheme was applied to the centrifugal pump for test,and the pump test performance curve was obtained.The results show that the circumferential overlap and gap width of the small blades have a great influence on the head and efficiency.The small blades can effectively improve the flow structure inside the two-stage impeller.After the impeller optimization scheme is adopted.The head is increased by 2.3%,and the efficiency is increased by 0.86%.Therefore,the optimization design of the gap drainage impeller can effectively improve the pump performance.

关 键 词：缝隙引流叶轮 离心泵 正交试验 流动结构 

分 类 号：TH311[机械工程—机械制造及自动化]