Tests for flow induced characteristics of a centrifugal pump under air-water two-phase inflow condition
SI Qiaorui1, CUI Qianglei1, YUAN Jianping1, ZHANG Keyu2, YUAN Shouqi1
1. Research Center of Fluid Machinery Engineering and Technology，Jiangsu University，Zhenjiang 212013，China
2. Commercial Vehicle Technology Center of SAIC Motor Corporation Limited，Shanghai 200041，China
A two-phase flow liquid pumping test ring was built in order to study the flow induced characteristics of centrifugal pumps under air-water two-phase inflow condition. Pump performance were measured of a specific speed ns=132.2 centrifugal pump under different flow rate and different inlet air void fraction，pressure pulsation and vibration signal spectrum and their probability density map were also obtained for analyze. The results show that the performance of centrifugal pump is more sensitive to air in small flow condition under air-water two-phase inflow condition. The performance drops sharply when the air void fraction is more than 8%，and the range of data collected is narrower and more disorganized. The maximum air void fraction of model pump could reach 10% when the pump operates normally. The dominant frequency of pump outlet pressure pulsation is still at the blade passing frequency even under air-water two-phase condition. Frequency amplitude increases with the increase of inlet air void fraction. The greater of the inlet air void fraction，the more obvious of the rate of low frequency broadband characteristics. The pressure fluctuation signal and vibration signal are both obey the normal distribution. With the increase of inlet gas content, the probability density function （PDF）amplitude of pressure pulsation decreases gradually，and its amplitude span becomes wider gradually. The corresponding is that the amplitude of the probability density function of vibration increases first，then decreases，and reaches the minimum when the inlet gas content is 5% (which is still greater than that without air)，and then increases. Therefore，the variation law of this two signals with different inlet air void fraction could be used as an important basis for flow monitoring.
司乔瑞1，崔强磊1，袁建平1，张克玉2，袁寿其1. 气液两相入流条件下离心泵内部流动诱导特性实验研究[J]. 振动与冲击, 2019, 38(9): 15-21.
SI Qiaorui1, CUI Qianglei1, YUAN Jianping1, ZHANG Keyu2, YUAN Shouqi1. Tests for flow induced characteristics of a centrifugal pump under air-water two-phase inflow condition. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(9): 15-21.
[1] 袁寿其，施卫东，刘厚林，等. 泵理论与技术[M]. 北京：机械工业出版社，2014.
[2] 傅春. 气液两相流动结构复杂性分析[D]. 天津大学，2015.
[3] 陈次昌，刘正英，刘天宝，等. 两相流泵的理论与设计[M]. 北京：兵器工业出版社，1993.
[4] Patel B R，Runstadler Jr P W. Investigations into the two-phase flow behavior of centrifugal pumps[J]. Polyphase Flow in Turbomachinery，1978：79-100.
[5] Kosmowski I. Behaviour of centrifugal pump when conveying gas entrained liquids[C]//7th Technical Conference of BPMA. 1981：283-291.
[6] Sekoguchi K，Takada S，Kanemori Y. Study of air-water two-phase centrifugal pump by means of electric resistivity probe technique for void fraction measurement：1st report，measurement of void fraction distribution in a radial flow impeller［J］. Bulletin of JSME，1984，27（227）：931-938.
[7] Kim Y T，Tanaka K，Matsumoto Y，et al. Characteristics and flow patterns of a small screw-type centrifugal pump operating in air –water two-phase flow[J]. Transactions of the Japan Society of Mechanical Engineers Part B，1999，65（639）：3690-3696.
[8] Pirouzpanah S，Gudigopuram S R，Morrison G L. Two-phase flow characterization in a split vane impeller Electrical Submersible Pump[J]. Journal of Petroleum Science & Engineering，2016，148（2017）：82-93.
[9] Minemura K，Murakami M. A theoretical study on air bubble motion in a centrifugal pump impeller[J]. Journal of Fluids Engineering，1980，102（4）：446-455.
[10] Furuya O. An analytical model for prediction of two-phase (noncondensable) flow pump performance[J]. Journal of Fluids Engineering (Transaction of The ASME)，1985，107 （1）：139-147.
[11] Caridad J，Kenyery F. CFD Analysis of electric submersible pumps (ESP) handling two-phase mixtures[J]. Journal of Energy Resources Technology，2004，126（2）：99-104.
[12] Kim J H，Lee H C，Kim J H，et al. Improvement of hydrodynamic performance of a multiphase pump using design of experiment techniques[J]. Journal of Fluids Engineering，2015，137（8）：081301.
[13] Müller T，Limbach P，Skoda R. Numerical 3D RANS simulation of gas-liquid flow in a centrifugal pump with an Euler-Euler two-phase model and a dispersed phase distribution[C]// European Turbomachinery Conference，2015.
[14] 付强，习毅，朱荣生，等. 含气率对AP1000核主泵影响的非定常分析[J]. 振动与冲击，2015，34（6）：132-136.
FU Qiang，XI Yi，ZHU Rong-sheng，et al. AP1000 nuclear main pump internal unsteady analysis under gas-liquid two phase condition[J]. Journal of Vibration and Shock，2015，34（6）：132-136.
[15] 袁建平，张克玉，司乔瑞，等. 基于非均相流模型的离心泵气液两相流动数值研究[J]. 农业机械学报，2017，48（1）：89-95.
YUAN Jian-ping，ZHANG Ke-yu，SI Qiao-rui，et al. Numerical investigation of gas-liquid two-phase flow in centrifugal pumps based on inhomogeneous model[J]. Transactions of the Chinese Society for Agricultural Machinery，2017，48（1）：89-95.
[16] Si Qiao-rui，Bois Gerard，Zhang Ke-yu，et al. Air-water two-phase flow experimental and numerical analysis in a centrifugal pump[C]. Proceedings of 12th European Conference on Turbomachinery (Fluid dynamics & Thermodynamics)，3rd-7th，April，2017，Stockholm，Sweden.
[17] 盛骤，谢式千. 概率论与数理统计及其应用[M]. 北京：高等教育出版社，2004.
[18] Xiaojun，Benxu，Yucheng，et al. Statistical characteristics of suction pressure signals for a centrifugal pump under cavitating conditions[J]. Journal of Thermal Science，2017，269（1）：47-53.
[19] 司乔瑞，余志顺，袁寿其，等．带诱导轮高速离心泵流动诱导振动数值分析[J]．振动与冲击，2013，32(20)：102-106．
Si Qiao-rui Yu Zhi-shun Yuan Shou-qi Yuan Jian-ping Numerical study on flow induced vibration of high speed centrifugal pump with inducer. , 2013, 32(20): 102-106.
