航天推进技术研究院主办
LIU Zhan-yi,ZHANG Wei-jing,YANG Jian-wen,et al.Influence of key clearance on pump performance[J].Journal of Rocket Propulsion,2015,41(02):56-62.
关键间隙对泵性能影响的研究
- Title:
- Influence of key clearance on pump performance
- Keywords:
- clearance; pump; hydraulic performance; anti-cavitation performance
- 分类号:
- V434.2-34
- 文献标志码:
- A
- 摘要:
- 在泵的设计中,间隙的尺寸控制向来都是一个难题,过大会损害泵的性能,过小则有发生碰磨的可能。针对关键间隙对泵性能影响的问题,利用ANSYS CFX软件,采用高精度六面体网格,应用SST湍流模型和Rayleigh-Plesset汽蚀模型,对具有不同间隙的某型氧化剂泵进行了流场仿真,获得了间隙对泵水力性能和抗汽蚀性能的影响规律,并且从压力分布、气相份额分布和速度场等方面分析了产生这种影响的原因。结果表明:浮动环间隙越小,泵效率越高;诱导轮叶顶间隙越小,泵的抗汽蚀性能越高。泵的抗汽蚀性能随诱导轮叶顶间隙减小而提高的原因在于:叶顶回流强度减弱导致能量损失减少,离心轮入口静压升高。
- Abstract:
- Size control of the clearance is always a complex problem for pump design. For the influence of key clearance on pump performance, ANSYS CFX software, fine hexahedral grid, SST turbulent model and Rayleigh-Plesset air-cavitation model were adopted to carry out the flow field numerical simulation of certain oxidizer pump with different clearance sizes, by which an influence rule of clearance on pump hydraulic and anti-cavitation performance was obtained. In addition, the reasons of generating these influences are analyzed in the aspects of pressure distribution, gaseous phase quotient distribution and velocity field. The result indicates that smaller the float ring clearance is, the higher the efficiency should be; the smaller the blade tip clearance of inducer, the higher the anti cavitation performance of pump becomes. The reason is that smaller clearance leads to weaker regurgitant intensity, then energy loss decreases and static pressure at the inlet of centrifugal wheel increases.
参考文献/References:
[1]陈晖, 张恩昭, 黄智勇, 等. 高速诱导轮三维空化内流场计算[J]. 水泵技术, 2006 (5): 14-18,25.
[2]陈晖, 李斌, 张恩昭, 等. 液体火箭发动机高转速诱导轮旋转空化[J]. 推进技术, 2009, 30(4): 390-395.
[3]唐飞, 李家文. 诱导轮平面叶栅汽蚀不稳定现象的数值分析[J]. 火箭推进, 2011, 37(1): 34-39.
[4]崔宝玲. 高速诱导轮离心泵的理论分析与数值模拟[D]. 杭州:浙江大学, 2006.
[5]赵瑞. 高速诱导轮离心泵的数值模拟与试验研究[D]. 浙杭州:江理工大学, 2009.
[6]郭晓梅,李昳,崔宝玲, 等. 前置不同诱导轮高速离心泵旋转空化特性研究[J]. 航空学报, 2013, 34(7): 1572- 1581.
[7]李强, 楚武利, 吴艳辉, 等. 叶顶间隙对离心泵性能影响的数值模拟研究[J]. 计算机仿真, 2008, 25(12): 230-234.
[8]梁开洪, 张克危, 许丽. 轴流泵叶顶间隙流动的计算流体动力分析[J]. 华中科技大学学报, 2004, 32(9): 36-38.
[9]牛凯斌. 离心泵诱导轮入口回流空化的数值研究[D]. 西安: 西安理工大学, 2010.
[10]奥夫相尼科夫, 博罗夫斯基. 液体火箭发动机涡轮泵装置原理与计算[M]. 任汉芬, 夏德新, 译. 北京: 中国航天工业总公司第十一研究所(京), 1999.
相似文献/References:
[1]杜大华,黄金平,邢理想,等.液体火箭发动机泵动态特性水力试验研究[J].火箭推进,2013,39(03):50.
DU Da-hua,HUANG Jin-ping,XING Li-xiang,et al.Hydraulic test research on dynamic characteristics of oxygen pump of liquid rocket engine[J].Journal of Rocket Propulsion,2013,39(02):50.
备注/Memo
收稿日期:2014-11-29;修回日期:2015-01-14 作者简介:刘占一(1985—),男,工程师,研究领域为液体火箭发动机内流场与传热研究