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Design of axial flow pump modification and its effect based on CFD

calculation

Shi Lijian, Tang Fangping

1

1※

, Xie Rongsheng1, Qi Lilong1, Yang Zhengdong2

(1. School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou 225100, China;

2. The Second Pumping Station Management of Huai’an, Huai’an 223200, China)

Abstract: This paper studied the selection and modification of the main pumps of the second pumping station of Huai’an by using CFD. The study analyzed the operation status of the main pumps and confirmed the necessity of reinforcement of the main pumps of the second pumping station of Huai’an. Selecting the main pumps for the second pumping station of Huai’an was carried out based on its operation data over these years, and the excellent hydraulic model of TJ05-ZL-02 was chosen. The hub ratio of the hydraulic model TJ05-ZL-02 is 0.4, while the original hub ratio of the second pumping station of Huai’an is 0.4667. Therefore, the hub ratio of the chosen hydraulic model must be modified. At the same time, to meet the requirements of diversion, drainage engineering of the second pumping station of Huai’an ensured that the pump model modified has the similar performance with the chosen hydraulic model, reduce the coefficient of flow and decrease the head of the high efficient area. First of all, this paper analyzed the influence of the main parameters including cascades dense degree and blade angle of each section on the hydraulic performance of axial-flow pumps. Which controlling the change of directions of the blade hydraulic performance. And use CFD to verify the hydraulic performance of the axial-flow pump when parameters changes. then decided the final retrofit design program. The feasibility of retrofitting program has been demonstrated through the numerical simulation of comparing the axial-flow pumps device before and after modification. Numerical simulation of the pump device adopts the standard k-ε model, …… 此处隐藏：4734字，全部文档内容请下载后查看。喜欢就下载吧 ……