航天推进技术研究院主办
[1]刘海丽,张立强,李学华,等.低比转速高速泵螺壳形式对性能影响分析[J].火箭推进,2015,41(03):52-58.
LIU Hai-li,ZHANG Li-qiang,LI Xue-hua,et al.Influence of volute case type for low-specific-speed pump on pump performance[J].Journal of Rocket Propulsion,2015,41(03):52-58.
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LIU Hai-li,ZHANG Li-qiang,LI Xue-hua,et al.Influence of volute case type for low-specific-speed pump on pump performance[J].Journal of Rocket Propulsion,2015,41(03):52-58.
低比转速高速泵螺壳形式对性能影响分析
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
41
期数:
2015年03期
页码:
52-58
栏目:
研究与设计
出版日期:
2015-06-30
- Title:
- Influence of volute case type for low-specific-speed pump on pump performance
- Keywords:
- volute case passage; circular-volute case passage; high-speed centrifugal pump; numerical simulation; test
- 分类号:
- V434.2-34
- 文献标志码:
- A
- 摘要:
- 利用流体计算软件CFX，分别对低比转速蜗壳与环形流道离心泵的流场进行了不同工况下三维定常湍流数值模拟，并进行了试验验证。水力性能计算结果与试验偏差小，数值仿真方法是合理有效的。通过对2种泵内部流场特性的比较分析，得到了其流动机理, 蜗壳流道离心泵的蜗壳出口流道对应流体的撞击所产生的回流与漩涡明显，压力与相对速度分布与其他流道差别较大，是水力损失的主要原因；2种离心泵在距离入口较远处的叶片压力与相对速度分布基本一致。最后通过对蜗壳流道离心泵取不同的喉部面积在设计工况下进行数值模拟，进行了优化设计。结果表明：当喉部面积为蜗壳第八断面的1.1倍时，泵性能最佳。
- Abstract:
- The 3D steady turbulence numerical simulation of flow fields in the low-specific-speed case with volute passage and centrifugal pump with circular passage were performed separately by means of the fluid simulation software CFX. Furthermore, the tests were carried out. The calculated result of pump performance has a little deviation with experimental data. It means that the method is reasonable and effective. From comparison of two different pumps, the flow mechanism and loss of water power were found. The backflow and vortex caused by impact of fluid from the exit of volute case are obvious. Its pressure and relative velocity distribution is very different from other passages. This is the main reason of water power loss. The show that the performance of pump is most excellent when the ratio of throat area is 1.1:1 to the eighth section of the volute case, which provide a scientific basis for the improvement and further development of pump.
参考文献/References:
[1]耿少娟, 聂超群, 黄伟光. 不同叶轮形式下离心泵整机非定常流场的数值研究[J]. 机械工程学报, 2006, 42(5): 27-31.
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[8]沙玉俊. 高温高压离心泵三维湍流数值模拟及流动特性研究[D]. 北京: 清华大学热能工程系，2011.
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备注/Memo
收稿日期：2014-11-24；修回日期：2015-03-18 作者简介：刘海丽（1980—），女，博士，研究领域为离心泵的优化设计
更新日期/Last Update:
1900-01-01