Experiment and numerical simulation of external performances and internal flow of a molten salt pump
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摘要: 为了揭示熔盐泵内两相流动的规律,研究了熔盐泵试验方法,得到了熔盐泵的外特性.采用粒子成像测速(PIV)技术测量了蜗舌附近熔盐泵内流动,并对熔盐泵内两相流动进行了非定常数值模拟,阐述了试验结果与模拟结果之间的差别,获得了晶体颗粒在熔盐泵内的体积分数分布,并分析了其演化规律.结果表明:熔盐泵内晶体颗粒体积分数分布较稳定,颗粒集中于叶片吸力面附近.粒径对颗粒在叶轮流道内的积聚影响比较大,粒径越大,颗粒积聚越明显.熔盐泵出口静压周期性波动,波动幅度受叶轮内颗粒体积分数分布影响.Abstract: In order to reveal the regularity of two-phase flow in the molten salt pump, an experimental method of a molten salt pump was researched, and the external performances were obtained. The internal flow field near the volute tongue was measured by using PIV (particle image velocimetry) technology. Unsteady numerical simulation of two-phase flow in the molten salt pump was carried out. The differences between experiment and numerical simulation results were elaborated. The distribution of volume fraction of crystal particles was obtained and its evolutional regularity was analyzed. The results show that the distribution of volume fraction of crystal particle is stable in the molten salt pump. In the impeller, particles are accumulated near the suction side of blades. The particle volume fraction is affected significantly by the particle diameter. The larger particle size means more obvious particle accumulation phenomenon. The molten salt pump outlet's static pressure fluctuates periodically, and the amplitude of pressure fluctuation is affected by the particle volume fraction distribution in the impeller passage.
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Key words:
- molten salt pump /
- external performance /
- two-phase flow /
- particle image velocimetry /
- unsteady flow
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[1] 崔海亭,杨锋.蓄热技术及其应用[M].北京:化学工业出版社,2004. [2] 邵春雷,顾伯勤,黄星路,等.低比转速泵叶轮流道内部流动的PIV试验[J].航空动力学报,2010,25(9):2091-2096. SHAO Chunlei,GU Boqin,HUANG Xinglu,et al.Experimental study on flow in the impeller of low specific speed pump using particle image velocimetry[J].Journal of Aerospace Power,2010,25(9):2091-2096.(in Chinese) [3] 刘正先,王永,曹淑珍,等.非设计工况下离心叶轮内湍流场的LDV测量[J].航空动力学报,2004,19(4):449-454. LIU Zhengxian,WANG Yong,CAO Shuzhen,et al.LDV measurements of turbulent flow field in a centrifugal impeller at off-design flow[J].Journal of Aerospace Power,2004,19(4):449-454.(in Chinese) [4] 刘正先,姜印平,曹淑珍,等.离心叶轮内三维湍流流场的LDV测量[J].航空动力学报,2002,17(3):287-291. LIU Zhengxian,JIANG Yinping,CAO Shuzhen,et al.LDV measurements of three-dimensional turbulent flow field in a centrifugal impeller[J].Journal of Aerospace Power,2002,17(3):287-291.(in Chinese) [5] Feng J,Benra F K,Dohmen H J.Unsteady flow visualization at part-load conditions of a radial diffuser pump:by PIV and CFD[J].Journal of Visualization,2009,12(1):65-72. [6] Yang Z J,Wang F J,Zhou P J.Evaluation of subgrid-scale models in large-eddy simulations of turbulent flow in a centrifugal pump impeller[J].Chinese Journal of Mechanical Engineering,2012,25(5):911-918. [7] Shojaeefard M H,Tahani M,Khalkhali A,et al.A parametric study for improving the centrifugal pump impeller for use in viscous fluid pumping[J].Heat and Mass Transfer,2013,49(2):197-206. [8] Stel H,Amaral G D L,Negrão C O R,et al.Numerical analysis of the fluid flow in the first stage of a two-stage centrifugal pump with a vaned diffuser[J].Journal of Fluids Engineering,2013,135(7):071104.1-071104.9. [9] 马冬英,雷宗琪,梁国柱.基于相对流面理论的液体火箭发动机泵内部流动计算[J].航空动力学报,2013,28(3):583-590. MA Dongying,LEI Zongqi,LIANG Guozhu.Calculation of internal flow in pump of liquid rocket engine based on theory of relative stream surface[J].Journal of Aerospace Power,2013,28(3):583-590.(in Chinese) [10] 许洪元,吴玉林,戴江,等.离心式叶轮中低浓度固体颗粒分布的研究[J].工程热物理学报,1994,15(3):255-291. XU Hongyuan,WU Yulin,DAI Jiang,et al.Study on distribution of dilute solid particles in centrifugal impeller[J].Journal of Engineering Thermophysics,1994,15(3):255-291.(in Chinese) [11] 高波,杨敏.旋流泵内颗粒分布及对盐析特性的影响[J].工程热物理学报,2009,30(12):2031-2033. GAO Bo,YANG Min.Particle concentration distribution and its effect on salt-out features in a vortex pump[J].Journal of Engineering Thermophysics,2009,30(12):2031-2033.(in Chinese) [12] Tahsin E,Mesut G.Performance characteristics of a centrifugal pump impeller with running tip clearance pumping solid-liquid mixtures[J].Journal of Fluids Engineering,2001,123(9):532-538. [13] Barrios L,Prado M G.Experimental visualization of two-phase flow inside an electrical submersible pump stage[J].Journal of Energy Resources Technology,2009,133(4):453-467. [14] Barrios L,Prado M G.Modeling two-phase flow inside an electrical submersible pump stage[J].Journal of Energy Resources Technology,2009,133(4):227-231. [15] José A C,Frank K.Slip factor for centrifugal impellers under single and two-phase flow conditions[J].Journal of Fluids Engineering,2005,127(3):317-321. [16] 邵春雷.离心泵内部流动及动态虚拟设计方法研究[D].南京:南京工业大学,2008. SHAO Chunlei.Study on the internal flow and dynamic virtual design method of centrifugal pump[D].Nanjing:Nanjing Technology University,2008.(in Chinese) [17] Nicholas P,Poul S L,Christian B J.Flow in a centrifugal pump impeller at design and off-design conditions:Part 1 particle image velocimetry (PIV) and laser Doppler velocimetry (LDV) measurements[J].Journal of Fluids Engineering,2003,125(1):61-72. [18] 郭庭辉,段斌,罗小兵.微型泵的三维数值模拟与实验研究[J].工程热物理学报,2013,34(12):2355-2358. GUO Tinghui,DUAN Bin,LUO Xiaobing.Three-dimensional numerical simulation and experimental study of the micropump[J].Journal of Engineering Thermophysics,2013,34(12):2355-2358.(in Chinese)
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