基于正交设计法的无过载旋流泵叶轮优化设计  

Optimized Design of the Impeller of a Non-overload Vortex Pump Based on the Orthogonal Design Method

作　　者：欧鸣雄[1] 林鹏[1] 王秀礼[1] 苏保稳[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《热能动力工程》2012年第5期591-595,627-628,共5页Journal of Engineering for Thermal Energy and Power

基　　金：国家科技型中小企业创新基金资助项目(08C26213200647)

摘　　要：选择叶轮外径、叶轮出口宽度、叶片出口安放角、叶片数以及无叶腔宽度5因素,每个因素各取2水平,制定了L8(27)正交试验方案,探索了几何参数对效率、扬程和轴功率的影响规律。旋流泵基本参数为:Q=50 m3/h、H=8 m、n=1 470 r/min。采用流体动力学软件Fluent对正交设计中每种组合进行性能预测,通过分析性能曲线对比图,找到了对于各个性能的最优方案;根据极差的大小对结果进行分析与比较,得到一组最佳参数组合。根据模拟结果设计模型泵并进行试验,试验结果和数值模拟结果基本吻合,验证了数值计算方法的有效性和可靠性,试验结果表明:模型泵达到设计要求,实现无过载的同时,保持了较高的效率与较宽的高效区。本试验结果为进一步研究无过载旋流泵的水力性能和优化设计方法提供了有益的参考。By choosing five factors,namely,impeller outer diameter,impeller outlet width,blade outlet installation angle,number of blades and bladeless cavity width,and 2 levels for each factor,formulated was a L8(27) orthogonal test scheme and explored was the law of the geometrical parameters influencing the efficiency,head and shaft power.The basic parameters of the vortex pump were as follows:Q=50 m3/h,H=8 m and n=1 470 r/min.For each combination in the orthogonal design,the performance was predicted by using the fluid dynamics software Fluent.The optimum schemes for each performance were identified by analyzing the chart for contrasting the performance curves.According to the ranges,the results were analyzed and compared with a group of the combinations of optimum parameters being obtained.In the light of the simulation results,the model pump was designed and a test was performed.The test results are basically in agreement with the numerical simulation results,verifying that the numerical calculation method in question is effective and reliable.The test results show that the model pump can meet the design requirements,keeping a relatively high efficiency and a relatively wide high efficiency zone at the same time of realizing an operation without any overload.The test results can offer useful reference for further studying the hydrodynamic performance of a non-overload vortex pump and optimizing the design methods.

关 键 词：旋流泵 无过载 正交设计 数值模拟 

分 类 号：TH133[机械工程—机械制造及自动化]