轮毂比改变的轴流泵装置数值模拟研究

发布时间：2018-01-08 05:11

本文关键词：轮毂比改变的轴流泵装置数值模拟研究　出处：《中国农村水利水电》2017年07期 　论文类型：期刊论文

更多相关文章： 水力模型 数值模拟 泵装置 轮毂比

【摘要】：大型泵站工程改造时,不更新土建结构,只更新水力机械设备,而现有优秀水力模型轮毂比不能保证一致时,需进行不同轮毂比对轴流泵装置性能的影响研究。基于数值模拟手段研究不同轮毂比的两副水力模型对轴流泵装置水力性能的影响,得到2种方案泵装置的水力性能,分析了不同轮毂比的轴流泵装置内特性和外特性差别。研究结果表明:对单泵而言,轮毂比较大的轴流泵水力模型效率更高,汽蚀性能较差;对于泵装置性能而言,两者设计工况效率差别不大,总体性能相近。轮毂比增大后,高效区向小流量偏移。并得出当大型泵站更新改造时,轮毂比成为不可更改的因素时,改型设计是可行的。
[Abstract]:In the reconstruction of large pumping station, the civil structure is not renewed, only the hydraulic machinery and equipment are renewed, but the wheel / hub ratio of the existing excellent hydraulic model can not be guaranteed to be the same. The influence of different hub ratio on the performance of axial flow pump device is studied. Based on the numerical simulation method, the influence of two hydraulic models with different hub ratio on the hydraulic performance of axial flow pump device is studied. The hydraulic performance of the two schemes is obtained, and the internal and external characteristics of the axial flow pump with different hub ratios are analyzed. The results show that the hydraulic model of the axial flow pump with larger hub is more efficient than the single pump. Poor cavitation performance; For the performance of pump device, the efficiency of the two design conditions is not different, and the overall performance is similar. When the wheel hub ratio increases, the high-efficiency zone shifts to small flow rate, and it is concluded that when the large pumping station is renovated. When the wheel hub ratio becomes an immutable factor, the modified design is feasible.
【作者单位】：扬州扬大水利机械有限责任公司;深圳市水务规划设计院有限公司;扬州大学水利与能源动力工程学院;
【基金】：“十二五”农村领域科技计划项目(2012BAD08B03-2) 江苏省研究生科研创新计划项目(KYLX15_1365)
【分类号】：TH312
【正文快照】： 由于泵站工程水泵机组设计不合理、运行时间长、设备老化等问题,导致水泵机组运行扬程长期偏离设计扬程、泵装置效率长期处于非高效区、水泵汽蚀非常严重[1]。因此,泵站更新改造过程中必须对泵机组重新进行选型设计。在轴流泵选型设计方面国内外有大量的文献可以参考[2-6],针

【参考文献】