The shape of impeller blades of a centrifugal pump affects the best efficiency point (BEP), and splitter blades improve the pump performance at BEP. In this work, multiple parameters such as number of blades, length of splitter blade, splitter blade angle at hub, and wrap angle were modified to maximize head and minimize input power. The problem was solved by a numerical and experimental approach. Initially, an impeller was designed and tested in a laboratory setup. The same impeller was simulated in a computational fluid dynamics (CFD) solver, checked the accuracy of the CFD results, optimized by an in-house surrogate-based optimization code and finally the optimal designed manufactured and tested again. The mix and match of the splitter blade with the other parameters improved the pump performance i.e. head by 8.2% and overall efficiency by 3%. The improvement was due to the reduction in pressure fluctuations and uniform blade loading throughout the impeller blade span.

离心泵叶轮叶片的形状影响最佳效率点 (BEP)，分流叶片可提高泵在 BEP 下的性能。在这项工作中，修改了多个参数，例如叶片数量、分流器叶片长度、轮毂处分流器叶片角度和包角，以最大化压头并最小化输入功率。这个问题是通过数值和实验方法解决的。最初，叶轮是在实验室设置中设计和测试的。在计算流体动力学 (CFD) 求解器中模拟相同的叶轮，检查 CFD 结果的准确性，通过基于内部代理的优化代码进行优化，最后再次制造和测试最佳设计。分流叶片与其他参数的混合搭配提高了泵的性能，即扬程提高了 8.2%，整体效率提高了 3%。