Flow mechanism and performance analysis of axial tip clearance micro jet in impeller blade of liquid ring pump

被引：0
|
作者：
Wei X. [1 ]
Zhang R. [1 ]
Liu G. [1 ]
Meng F. [2 ]
机构：
[1] College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou
[2] Zibo Water Ring Vacuum Pump Factory Corporation Limited, Shandong Huacheng Group Corporation Limited, Zibo
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2021年 / 36卷 / 06期
关键词：
Active control; Axial tip clearance; Leakage flow; Liquid ring pump; Micro jet;
D O I：
10.13224/j.cnki.jasp.2021.06.018
中图分类号：
学科分类号：
摘要：
The axial clearance leakage flow of liquid ring pump has important influence on its hydraulic performance. To suppress the axial tip clearance leakage flow of the blade and improve pump hydraulic performance, the 2BEA-203 liquid ring pump was selected as the research object, and the micro jet was designed in the axial tip of blade. The influence mechanism of micro jet on the leakage flow field and the performance of liquid ring pump was analyzed by numerical simulation. The analysis results indicated that the axial clearance jet can effectively restrain the leakage flow, and the efficiency and vacuum of liquid ring pump were improved in a certain range. A relatively high pressure region was formed at the outlet of the jet hole in the axial tip clearance, and the micro jet occupied the clearance passage. Part of the jet fluid interacted with the leakage flow, and the clearance vortex was formed. The leakage flow was blocked by the jet. As a result, the intensity of the leakage flow decreased, and the leakage vortex behind the suction surface moved forward. The leakage flow in the axial clearance had complexity temporal and spatial distribution characteristics. The distribution of turbulent kinetic energy increased gradually along the blade rotational direction from the suction area. Due to the inhibition of jet flow, the distribution of turbulent kinetic energy on the suction surface of jet impeller clearance was obviously weaker than that of the prototype impeller clearance. The intensity of leakage flow decreased along the chord direction. Part of the micro jet flowed into the blade axial clearance along the chord direction, and occupied the downstream clearance passage. The sealing performance of the blade tip clearance was improved. © 2021, Editorial Department of Journal of Aerospace Power. All right reserved.
引用
收藏
页码：1296 / 1303
页数：7
相关论文
共 19 条
  • [1] ZHANG Desheng, SHI Lei, CHEN Jian, Et al., Analysis on transient characteristics of tip leakage vortex in axial flow pump using large eddy simulation, Transactions of the Chinese Society of Agricultural Engineering, 31, 11, pp. 74-80, (2015)
  • [2] KAKUDA K, USHIYAMA Y, OBARA S, Et al., Flow simulations in a liquid ring pump using a particle method, Computer Modeling in Engineering and Sciences(CMES), 66, 3, pp. 215-226, (2010)
  • [3] KAKUDA K, NAGASHIMA T, HAYASHI Y, Et al., Three-dimensional fluid flow simulations using GPU-based particle method, Computer Modeling in Engineering and Sciences(CMES), 93, 5, pp. 363-376, (2010)
  • [4] HUANG Si, RUAN Zhiyong, DENG Qingjian, Et al., Numerical analysis of gas-liquid two-phase flow in liquid-ring vacuum pump, Vacuum, 46, 2, pp. 49-52, (2009)
  • [5] HUANG Si, LI Wenzhen, SHU Yalan, Et al., Experimental study on similarity law of liquid-ring vacuum pump, Vacuum, 1, pp. 40-42, (2018)
  • [6] ZHANG Renhui, GUO Guangqiang, Experimental study on gas-liquid transient flow in liquid-ring vacuum pump and its hydraulic excitation, Vacuum, 171, (2020)
  • [7] TIAN Lei, Numerical simulation of dynamic characteris-tics of one-way ball valve under gas-liquid two-phase flow, (2019)
  • [8] ZHANG Renhui, TIAN Lei, GUO Guangqiang, Et al., Gas-liquid two-phase flow in the axial clearance of liquid-ring pumps, Journal of Mechanical Science and Technology, 34, 2, pp. 791-800, (2020)
  • [9] MENG Qinghe, CHEN Shaowen, LIU Hongyan, Et al., Experimental and numerical study on axially non-uniform clearances with a squealer cavity tip, Journal of Aerospace Power, 34, 8, pp. 1813-1821, (2019)
  • [10] YANG Dianliang, FENG Zhenping, Effects of squealer tip on blade aerodynamic performance and tip heat transfer in gas turbine, Journal of Xi'an Jiaotong University, 42, 7, pp. 838-842, (2008)
12