Abstract：In order to reduce pressure pulsation amplitude and the noise of vortex pump when the pump is running,three kinds of impeller blades are designed based on the unequal spacing blade distribution, studying the steady-state performance and pressure fluctuation of self-priming vortex pump. Internal radial and axial gap pressure data of self-priming vortex pump is obtained by computing vortex self-priming unsteady flow and the performance of the pump with the RNG k-ε model. The numerical results show that the unequal spacing blade distribution will have a certain effect on the performance of self-priming vortex pump. When the modulation angle is small, that has little effect on the efficiency of the self suction pump. Compared with the equal spacing blades, the pressure distribution of the unequal spacing blades is small. In addition, the unequal spacing blade can effectively reduce pressure pulsation amplitude of the self-priming vortex pump and change pulsating frequency distribution, and changes of modulation angle will affect the pressure fluctuation amplitude.When the modulation angle is 5°,pressure fluctuation amplitude of main frequency declines a lot. The better pressure fluctuation characteristics can be obtained by controlling the modulation angle in the proper range.
刘志超, 孔繁余, 王洋, 谢山峰, 赵立峰. 非等距叶片分布对旋涡自吸泵压力脉动的影响[J]. 排灌机械工程学报, 2017, 35(2): 113-118.
LIU Zhichao, KONG Fanyu, WANG Yang, XIE Shanfeng, ZHAO Lifeng. Effect of unequal spacing blade distribution on pressure fluctuation of self-priming vortex pump. Journal of Drainage and Irrigation Machinery Engin, 2017, 35(2): 113-118.
[1]ENGEDA A,RAHEEL M M.Systematic design approach for radial blade regenerative turbomachines[J].Journal of propulsion and power,2005,21(5):884-892.[2]MEAKHAIL T,PARK S O.An improved theory for regenerative pump performance[J].Journal power and energy,2005,219(3):213-222[3]QUAIL F J,SCANLON T,BAUMGARTNER A.Design study of a regenerative pump using one-dimensional and three dimensional numerical techniques[J].European journal of mechanics B/fluids,2012,31:181-187.[4]CHOI W C,YOO I S,PARK M R,et al.Experimental study on the effect of blade angle on regenerative pump performance[J]. Journal of power and energy,2013,227(5):585-592.[5]王洋,傅剑辉,蒋其松.闭式叶轮叶片位置对旋祸泵性能的影响[J].农机化研究,2010,32(9):150-154. WANG Yang,FU Jianhui,JIANG Qisong. The influence of the vortex pump performance to the position of a closed impeller blade[J].Journal of agricultural mechanization research,2010,32(9):150-154.(in Chinese)[6]FENG J J,BENRA F,DOHMEN H J.Numerical investigation on pressure fluctuations for different configurations of vaned diffuser pumps[J].International journal of rotating machinery, 2007,2007:1-10.[7]黎义斌,李仁年,王秀勇,等.低比转数混流泵压力脉动特性的数值模拟[J].排灌机械工程学报,2013,31(3):205-209. LI Yibin, LI Rennian,WANG Xiuyong,et al.Numerical analysis of pressure fluctuation in low specific speed mixed-flow pump[J].Journal of drainage and irrigation machinery engineering,2013,31(3):205-209.(in Chinese)[8]智乃刚, 萧滨诗.风机噪声控制技术[M].北京:机械工业出版社,1985.[9]LIGHTHILL M J.On sound generated aerodynamically.Ⅰ.General theory[J].Proceedings of the royal society A,1952, 211(1107):564-587.[10]EWALD D, PAVLOVIC A, BOLLINGER J G. Noise reduction by applying modulation principles[J].Journal of the acoustical society of America,1971,49:1385.[11]WRIGHT S E. Sound radiation from a lifting rotor generated by asymmetric disk loading[J]. Journal of sound & vibration, 1969, 9(2):223-223.[12]孙晓峰.不等节距叶片风机气动声学特性的研究[J].北京航空航天大学学报,1986(4): 137-145. SUN Xiaofeng.The aeroacoustic nature of unequally spaced fan[J].1986(4):137-145.(in Chinese)[13]马健峰,袁民建,刘秋洪,等. 不等距叶片离心风机气动噪声的数值与实验研究[J]. 噪声与振动控制,2008(3):100-103. MA Jianfeng, YUAN Minjian, LIU Qiuhong, et al. Experimental and numerical study of aeroacoustics of a centrifugal fan with non-isometric blade impeller[J].2008(3):100-103.(in Chinese)
