Analysis on pressure fluctuation of interior flow in reversible pumping system for irrigation and drainage
Yang Fan1,Liu Chao1,Tang Fangping2,Zhou Jiren1
(1.College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou,Jiangsu 225009,China; 2.School of Energy and Power Engineering,Yangzhou University,Yangzhou,Jiangsu 225127,China)
Abstract:A physical model test was adopted to study the characteristics of pressure fluctuation of reversible pumping system for irrigation and drainage by performance and cavitation test.Three measu-ring points were arranged in front-end of inlet passage,the back-end of discharge passage and outlet of guide vane.The results show that the maximum relative amplitudes of pressure fluctuation at front-end of inlet passage,the back-end of discharge passage and outlet of guide vane were 0.22,1.10 and 1.20 respectively.With the increase of flow rate,the relative amplitude of pressure fluctuation increased in the front-end of inlet passage and the back-end of outlet passage,while the relative amplitude decreased first and then increased in outlet of guide vane.In the cavitation test the relative amplitude of pressure at outlet of guide vane increased when the intake pressure decreased to a certain value.The relative amplitudes of pressure fluctuation at the measuring points under different rotational speed varied with the lifting head in the same trends.For the same head,the relative amplitude increased with the increase of rotation speed in the front-end of inlet passage and the back-end of discharge passage,while no significant regularity was found in the relationship of outlet of guide vane and variation speed.
杨帆, 刘超, 汤方平, 周济人. 灌排双向立式泵装置内部水流压力脉动特性[J]. 排灌机械工程学报, 2011, 29(4): 316-321.
Yang Fan,Liu Chao,Tang Fangping,Zhou Jiren. Analysis on pressure fluctuation of interior flow in reversible pumping system for irrigation and drainage. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(4): 316-321.
[1]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.[2]郑源,刘君,周大庆,等.大型轴流泵装置模型试验的斥力脉动[J].排灌机械工程学报,2010,28(1):51-55.[3]宋振华,周济人,汤方平,等.贯流泵压力脉动测试信号的采集及处理分析[J].扬州大学学报:自然科学版,2009,12(2):53-57.[4]田辉,郭涛,孙秀玲,等.离心泵内部动静干涉作用的数值模拟[J].农业机械学报,2009,40(8):92-95.[5]Spence R,Amaral-Teixeira J. Investigation into pressure pulsations in a centrifugal pump using numerical me- thods supported by industrial tests [ J ]. Computersand Fluids,2008,37 ( 6 ) : 690 - 704.[6]Spence R,Amaral-Teixeira J. A CFD parametric study of geometrical variations on the pressure pulsations andperformance characteristics of a centrifugal pump [ J ].Computers and Fluids ,2009,38 (6) : 1243 - 1257.[7]Zhang Desheng,Shi Weidong, Chen Bin, et al. Unsteady flow analysis and experimental investigation of axial-flowpump [ J ]. Journal of Hydrodynamics ,2010,22 ( 1 ) :35 - 43.[8]Pavesi G, Cavazzini G, Ardizzon G. Time-frequency characterization of the unsteady phenomena in a centrifu- gal pump [ J ]. International Journal of Heat and Fluid Flow,2008,29 ( 5 ) : 1527 - 1540.[9]Wang Zhengwei, Peng Guangjie ,Zhou Lingjiu, et al. Hydraulic performance of a large slanted axial-flow pump[ J]. Engineering Computations, 2010, 27 (2) : 243 - 256.