高比转数混流泵非定常流场压力脉动特性

doi:10.3969/j.issn.1674-8530.2013.02.003

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摘要为了研究高比转数混流泵内部流场的压力脉动情况,采用大涡模拟方法对泵内三维非定常湍流场进行数值模拟,通过对监测点数据的分析得到了叶轮进口、叶轮出口、导叶中间和导叶出口4个截面的压力脉动的时域和频域情况,探讨了产生压力脉动的主要决定因素,同时也对不同流量下的压力脉动情况进行了对比．研究表明:这4个截面的压力脉动幅值从轮毂到轮缘均逐渐增大;叶轮进口截面压力脉动时域图规律性不明显,叶轮出口截面时域图在整个周期内呈现4个小周期,叶轮转动频率控制着叶轮进出口的压力脉动，且其影响随着流体远离叶轮而逐渐减弱；在导叶中间截面和导叶出口截面,叶轮对流体压力脉动的影响逐渐减小,压力脉动以低频振动为主,脉动幅值也大为减小;在不同流量下的压力脉动表现为小流量下幅值较大以及流量对主要频率影响较小,大流量工况下压力脉动情况要优于小流量工况．

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关键词 ：高比转数混流泵, 非定常流场, 压力脉动, 大涡模拟

Abstract：In order to study the pressure fluctuation of a high specific speed mixedflow pump, large eddy simulation was conducted to simulate the threedimensional unsteady turbulent flow field in the mixedflow pump. By monitoring and analyzing pressures, the pressure fluctuations of both timedomain and frequencydomain at impeller inlet, impeller outlet, guide vane channels and guide vane outlet were obtained. Main causes of pulse pressure were discussed and pressure pulsations under different flow rates were compared. Studies have shown that: the pressure pulse amplitudes at impeller inlet, impeller outlet, guide vane channels and guide vane outlet, have all gradually increased from hub to tip; pressure pulsation of time domain at impeller inlet shows no regularity while those at the impeller outlet presented four small cycles. Pressure pulses at impeller inlet and outlet are mainly determined by impeller rotation frequency. Pressure pulsation effects of the impeller on the fluid gradually decline, pressure pulsation is mainly low frequency vibration and pulse amplitude has greatly diminished at the vane channels and vane outlet. However, under low flow rates, the manifestation of pressure pulsation is greater amplitude and slight influence of flow on dominant frequency; under large flow rates, pressure pulsations are better than that under small flow rates.

Key words： high specific speed mixedflow pump unsteady flow field pressure fluctuation large eddy simulation

收稿日期: 2012-05-29 出版日期: 2013-02-28

基金资助:

教育部博士点基金资助项目(20113227120012); 江苏高校优势学科建设工程项目.

通讯作者: 贾飞(1987—),男,河南安阳人,硕士研究生(jiafei618@163.com),主要从事流体机械理论、特性及流动模拟研究．

作者简介: 王春林(1963—),男,江苏盐城人,教授(chwang@ujs.edu.cn),主要从事流体机械理论、特性及流动模拟研究．

引用本文:

王春林, 贾飞, 吴志旺, 刘栋. 高比转数混流泵非定常流场压力脉动特性[J]. 排灌机械工程学报, 2013, 31(2): 103-108. WANG Chun-Lin, JIA Fei, WU Zhi-Wang, LIU Dong. Pressure fluctuation of unsteady flow in high specific speed mixedflow pump. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(2): 103-108.

链接本文:

http://zzs.ujs.edu.cn/pgjx/CN/10.3969/j.issn.1674-8530.2013.02.003 或 http://zzs.ujs.edu.cn/pgjx/CN/Y2013/V31/I2/103

［1］Kim JinHyuk, Ahn HyungJin, Kim KwangYong. Highefficiency design of a mixedflow pump［J］.Science China Technological Sciences, 2010, 53(1):24-27.

［2］Masahiro Miyabe, Hideaki Maeda, Isamu Umeki, et al. Unstable headflow characteristic generation mechanism of a low specific speed mixed flow pump ［J］. Journal of Thermal Science, 2006,15(2): 115-120,144.

［3］王福军,张玲,张志民.轴流泵不稳定流场的压力脉动特性研究［J］.水利学报,2007,38(8):1003-1009. Wang Fujun, Zhang Ling, Zhang Zhimin. Analysis on pressure fluctuation of unsteady flow in axialflow pump［J］. Journal of Hydraulic Engineering, 2007,38(8):1003-1009.(in Chinese)

［4］Solis Moisés,Sofiane Bakir, Farid Khelladi, et al. Pressure fluctuations reduction in centrifugal pumps: Influence of impeller geometry and radial gap ［C］／／Proceedings of the ASME Fluids Engineering Division Summer Conference, 2009.

［5］Berten Stefan, Farhat Mohamed, Dupont Philippe, et al. Rotorstator interaction induced pressure fluctuations: CFD and hydroacoustic simulations in the stationary components of a multistage centrifugal pump［C］／／Proceedings of FEDSM 2007,2007:963-970.

［6］刘阳,袁寿其,袁建平.离心泵的压力脉动研究进展［J］.流体机械,2008,36(9):33-37.

Liu Yang,Yuan Shouqi,Yuan Jianping. Overview of pressure fluctuation in centrifugal pump［J］. Fluid Machinery, 2008, 36(9):33-37. (in Chinese)

［7］施卫东,冷洪飞,张德胜,等.轴流泵内部流场压力脉动性能预测与试验［J］.农业机械学报,2011,42(5):44-48.

Shi Weidong,Leng Hongfei,Zhang Desheng, et al. Performance prediction and experiment for pressure fluctuation of interior flow in axialflow pump ［J］. Transactions of the Chinese Society for Agricultural Machinery, 2011,42(5):44-48. (in Chinese)

［8］林恺,曹树良,祝宝山,等.用于高比转速混流泵设计的流场计算［J］.清华大学学报:自然科学版,2008,48(2): 219-223.

Lin Kai, Cao Shuliang, Zhu Baoshan, et al. Flow computations for the design of high specific speed mixedflow pumps［J］.Journal of Tsinghua University:Science and Technology, 2008,48(2):219-223. (in Chinese)

［9］王春林,郑海霞,司艳雷,等.等环量流型高比转速混流泵内部流场数值模拟［J］.流体机械,2009,37(4):18-21,59.

Wang Chunlin, Zheng Haixia, Si Yanlei, et al. Numerical simulation of interior flow for high specific speed mixedflow pump designed by constant circulation flow pattern ［J］.Fluid Machinery, 2009,37(4):18-21,59.(in Chinese)

［10］Kumar S, Bergada J M, Watton J. Axial piston pump grooved slipper analysis by CFD simulation of threedimensional NVS equation in cylindrical coordinates［J］.Computers and Fluids, 2009, 38(3):648-663.

［11］黄剑峰,张立翔,王文全,等.基于大涡模拟的水轮机内瞬态湍流场特性分析［J］.排灌机械工程学报,2010,28(6):502-505.

Huang Jianfeng, Zhang Lixiang, Wang Wenquan, et al. Large eddy simulation of transient turbulent flow in Francis turbine ［J］. Journal of Drainage and Irrigation Machinery Engineering, 2010,28 (6): 502-505.(in Chinese)

［12］Van Esch B P M. Performance and radial loading of a mixedflow pump under nonuniform suction flow［J］. Journal of Fluids Engineering, 2009,131(5): 0511011-0511017.