漂浮取水泵叶轮水力设计及内部流场数值模拟  

Impeller Hydraulic Design and Numerical Simulation of Inner Flow Field of Floating Water Pump

作　　者：吴杰[1] 张世富[2] 张起欣[1] 张冬梅[2] 王铭[1] 

机构地区：[1]后勤工程学院军事供油工程系,重庆401311 [2]后勤工程学院国家救灾应急装备工程技术研究中心,重庆401311

出　　处：《轻工机械》2016年第2期5-10,14,共7页Light Industry Machinery

基　　金：国家科技支撑计划(2014BAK05B08);工信部物联网发展专项资金支持(ZX201426903);重庆市科技攻关计划项目(cstc2012gg-sfgc00002)

摘　　要：为了研究漂浮取水泵内部流场分布规律,根据泵水力设计理论对叶轮进行了参数计算,基于Pro/E建立了叶轮和内部流场模型,利用FLUENT对内部流场进行了数值模拟,得到了漂浮取水泵的外特性曲线、压力和速度分布规律。结果表明:泵的功率曲线呈现驼峰状,效率曲线存在较宽的高效区;叶片受静压呈现旋转中心低,边缘高的总体趋势;泵叶片速度较大,隔舌和扩散管底部速度较小;在额定流量工况下,叶轮表面液流速度分布趋于均匀,流场分布较合理。研究结果可为优化叶轮几何参数、改善内部流场分布以及提高泵的效率提供一定参考。In order to study the distribution of inner flow field of floating water pump,impeller parameter calculation was performed according to the pump hydraulic design theory. An impeller and inner flow field model were established basing on Pro / E. FLUENT was used to conduct the numerical simulation of inner flow field and the external characteristic curves,pressure and velocity distribution were informed. The results show that the power curve appears to be humped,and there is a broad high efficiency area on efficiency curve. Static pressure of blade presents an overall trend,which is low value in the center of rotation and high on the edge. The velocity of impeller is larger than that of volute tongue and diffusion tube bottom. Under the rated flow condition,the velocity of impeller surface flow tends to be equally distributed and the flow field distribution is rational. It provides certain references for optimization of impeller geometrical parameters,coordination of inner flow field distributions and improvement of pump efficiency.

关 键 词：漂浮取水泵 叶轮 水力设计 数值模拟 

分 类 号：TH311[机械工程—机械制造及自动化]