吸入管出口位置及直径对环形射流泵影响的数值模拟  

Numerically Simulating the Influence of Outlet Position and Diameter of Suction Pipe on Annular Jet Pump

作　　者：李同卓[1] 杨志朋 LI Tongzhuo;YANG Zhipeng(School of Mechanical and Power Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南理工大学机械与动力工程学院,河南焦作454000

出　　处：《灌溉排水学报》2022年第3期63-68,共6页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(51774115);河南理工大学动力工程及热物理学科基金资助项目(722403/020)。

摘　　要：【目的】对吸入管出口位置以及直径大小对环形射流泵效率及流场的影响进行模拟分析。【方法】基于Realizable k-ε紊流模型,通过FLUENT软件对不同流量比条件下不同结构环形射流本进行建模并进行数值模拟。【结果】吸入管出口位置方面:流量比为0.4~0.6条件下出口位置应与吸入室收缩段入口保持较小距离,对于此研究模型下保持2 mm为最优,流量比为0.1~0.3时适当增大与吸入室收缩段入口之间间距可提高效率;吸入管直径方面:其他参量不变条件下,效率与吸入管直径正相关。【结论】流量比的变化导致对应的最佳吸入管出口位置随之变化;随着吸入管直径不断变大,环形射流泵的最高效率也不断增大,且最高效率点所对应流量比也在不断变大。【Objective】Jet pump has a wide applications in many areas and water flow in it is affected by many design parameters. In this paper, we analyzed numerically the influence of the outlet position and diameter of the suction pipe on efficiency and flow field of annular jet pump.【Method】The numerical model was based on the k-εturbulence model, and water flow in pumps with different configurations was simulated using the software FLUENT under different flow ratios.【Result】The outlet position of the suction pipe should not be far away from the inlet of the contraction section of the suction chamber when the flow ratio was 0.4~0.6;for what we studied, 2mm was the optimal distance. When the flow ratio was in the range of 0.1~0.3, increasing the spacing between the outlet and the inlet of the contraction section of the suction chamber could improve the efficiency of the pump. The efficiency of the pump is positively correlated with the suction tube diameter when other parameters are the same.【Conclusion】The change in flow ratio results in a change in the optimal outlet position of the suction pipe. The maximum efficiency of the annular jet pump and the flow ratio corresponding to the maximum efficiency point both increased,as the diameter of the suction pipe increased.

关 键 词：射流泵 数值模拟 吸入管 结构优化 

分 类 号：S277.9[农业科学—农业水土工程]