%A CHENG Xiaorui,, ZHANG Xuelian*, LYU Boru, LIU He %T Influence of diffuser radial position of guide vane on submersible well pump performance %0 Journal Article %D 2019 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.17.0268 %P 848-854 %V 37 %N 10 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_2775.shtml} %8 2019-10-25 %X In order to study the influence of radial position of guide vane on the performance of submersible well pump, nine configurations of guide vane were designed by changing the radial position of spatial guide vane under a certain condition of other parameters, aiming at the 250QJ125 of submersible well pump. Based on the Reynolds-averaged N-S equation, the RNG k-ε model and the SIMPLE algorithm, the three-dimensional numerical calculation of the full runner was carried out for the internal flow of the guide vane of submersible well pump in different radial positions. Through analysing the calculation results, the performance parameters of the submersible pump are obtained under different guide vane programs. At the same time, the loss of guide vane and the variation rule of cross section area as well as the turbulent kinetic energy and static pressure distribution inside the guide vane are compared. The results show that the radial position of the guide vane has a significant influence on the performance of the submersible well pump. When the radial distance of the guide vane is increased to an appropriate position, the internal loss of the guide vane is small, and the energy conversion capabi-lity is excellent. In addition, the fluctuation of the turbulent kinetic energy inside the guide vane is weakened, and the flow loss is greatly reduced, so as to improve the efficiency of pump. However, the variation rule on the cross section area of guide vanes is obviously different, and the degree of turbulent kinetic energy fluctuation aggravates when the radial distance is exaggerated. Therefore, the flow loss of guide vanes increases and the performance of pump drops.