Experimental Investigation on Surging Characteristics of Centrifugal Pump under Bubble Inflow Conditions

被引：0
|
作者：
He D. [1 ]
Zhang Z. [1 ]
Chang Z. [1 ]
Guo P. [1 ]
Bai B. [2 ]
机构：
[1] State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi’an University of Technology, Xi’an
[2] State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2022年 / 58卷 / 10期
关键词：
bubble flow; centrifugal pump; efficiency; pressure increment; surging;
D O I：
10.3901/JME.2022.10.289
中图分类号：
学科分类号：
摘要：
A centrifugal pump is designed to obtain the flow in the whole impeller channel. The surging characteristics of the centrifugal pump are investigated by employing the high-speed camera technology. The correlative mechanism between the gas and liquid distribution in the impeller and the pump surging is discussed; then the effects of the inlet gas volume fraction, the liquid flow rate and the rotating speed on the pump surging characteristics are analyzed. Finally, several typical pump surging prediction correlations to predict the critical gas volume rate are compared based on the present test data. The results show that the centrifugal pump surging is mainly affected by the gas-liquid two-phase distribution in the impeller. The pump surging occurs when flow pattern in impeller transforms from gas-pocket flow to separate flow. The increase of inlet gas volume fraction is directly responsible for the pump surging phenomenon by affecting the flow pattern in the impeller, thus affects the pump performance. Under the condition of surging of centrifugal pump, the surging can be alleviated by reasonably adjusting the liquid flow rate to change the flow pattern of pump. In addition, the gas-liquid separation in the impeller is delayed by increasing the rotational speed and thus delays the pump surging occurrence, which increases the gas pumping ability. Consequently, the pump performance is improved. The critical gas volume fraction obtained by the existing surging prediction models are deviated with the experimental results. Thus, a surging prediction model for the volute centrifugal pump is urgently needed. © 2022 Editorial Office of Chinese Journal of Mechanical Engineering. All rights reserved.
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页码：289 / 297
页数：8
相关论文
共 24 条
  • [1] YUAN Shouqi, SHI Weidong, LIU Houlin, Et al., Pump theory and technology[M], (2014)
  • [2] ZHOU Fangming, XU Shengli, WANG Xiaofang, Et al., High efficiency hydraulic model development of CAP1400 canned nuclear reactor coolant pump[J], Journal of Mechanical Engineering, 54, 7, pp. 176-183, (2018)
  • [3] WU D H，, REN Y, MOU J G，, Et al., Unsteady flow and structural behaviors of centrifugal pump under cavitation conditions[J], Chinese Journal of Mechanical Engineering, 32, 1, (2019)
  • [4] PINEDA H, BIAZUSSIB J, LOPEZB F, Et al., Phase distribution analysis in an electrical submersible pump (ESP) inlet handling water-air two-phase flow using computational fluid dynamics (CFD)[J], Journal of Petroleum Science and Engineering, 139, pp. 49-61, (2016)
  • [5] ZHANG J Y, CAI S J, LI Y J，, Et al., Visualization study of gas–liquid two-phase flow patterns inside a three-stage rotodynamic multiphase pump[J], Experimental Thermal and Fluid Science, 70, pp. 125-138, (2016)
  • [6] ZHANG Wenwu, YU Zhiyi, LI Yongjiang, Et al., Flow characteristics analysis for the whole flow passage of a multiphase rotodynamic pump[J], Journal of Mechanical Engineering, 55, 10, pp. 168-174, (2019)
  • [7] MINEMURA K, UCHIYAMA T, SHODA S, Et al., Prediction of air-water two-phase flow performance of a centrifugal pump based on one-dimensional two-fluid model[J], ASME Journal of Fluids Engineering, 120, pp. 327-334, (1998)
  • [8] SUN W, TAN L., Cavitation-Vortex-Pressure fluctuation interaction in a centrifugal pump using bubble rotation modified cavitation model under partial load[J], ASME Journal of Fluids Engineering, 142, 5, (2020)
  • [9] THOMAS S, ANDRE B, MARTIN N, Et al., Application of gamma-ray computed tomography for the analysis of gas holdup distributions in centrifugal pumps[J], Flow Measurement and Instrumentation, 46, pp. 262-267, (2015)
  • [10] LEA J F, BEARDEN J L., Effect of gaseous fluids on submersible pump performance[J], Journal of Petroleum Technology, 34, 12, pp. 2922-2930, (1982)
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