Influence of different guide vane parameters on hydraulic performance of box-culvert axial-flow pump
WANG Xinyu1, ZHAI Linpeng2, TANG Fangping1*, SHI Lijian1,SUN Zhuangzhuang1, ZHANG Wenpeng1, LIU Haiyu1
1. College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225000, China; 2. Jiangsu Rural Water Conservancy Technology Development Center, Nanjing, Jiangsu 210000, China
Abstract：In order to study the influence of different guide vane parameters on the hydraulic perfor-mance of box-culvert axial-flow pumps, the orthogonal design method was adopted, and the number, relative positions and sweep angles of guide vanes were selected as design factors. Three levels of factors are selected for combination, and numerical simulation is used to study the influence of the above factors on the pump device efficiency, the axial uniformity of the outlet flow channel, the hydraulic loss of the guide vane body and the average vortex angle at the outlet, and finally comprehensively determine the optimal design scheme. The results show that when only the parameters of the guide vane are changed, the number of guide vanes has a greater influence on the average vortex angle at the outlet of the guide vane and the axial uniformity of the outlet flow channel. The relative position of the guide vane plays a dominant role in the influence of the efficiency of the pump device and the hydraulic loss of the guide vane body. With the increase of the sweep angle of the guide vane, the pump device efficiency, the axial uniformity of the outlet flow channel, and the hydraulic loss of the guide vane first increase and then decrease, and the average vortex angle is less affected. Comparing the results of numerical analysis and model test, the efficiency is basically consistent around the design conditions, and the head is within the allowable range of error range. The research results can provide a theoretical basis for the optimal design of box-culvert axial-pump.
