Mechanism Analysis of Controlling Axial Clearance Leakage Flow in Liquid-Ring Vacuum Pump by Plasma Actuation with Different Layouts

  • GUO Guangqiang ,
  • FENG Yijiang ,
  • ZHANG Renhui ,
  • CHEN Xuebing ,
  • JIANG Lijie ,
  • LI Rui’an
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  • 1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
    2. Key Laboratory of Fluid Machinery and Systems of Gansu Province, Lanzhou 730050, China

网络出版日期: 2025-07-04

基金资助

This study was supported by National Natural Science Foundation of China (grant number 52269021), the Red Willow Excellent Youth Project of Lanzhou University of Technology, and the Central Government Guides Local Science and Technology Development Fund Projects (23ZYQA0320).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025

Mechanism Analysis of Controlling Axial Clearance Leakage Flow in Liquid-Ring Vacuum Pump by Plasma Actuation with Different Layouts

  • GUO Guangqiang ,
  • FENG Yijiang ,
  • ZHANG Renhui ,
  • CHEN Xuebing ,
  • JIANG Lijie ,
  • LI Rui’an
Expand
  • 1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
    2. Key Laboratory of Fluid Machinery and Systems of Gansu Province, Lanzhou 730050, China

Online published: 2025-07-04

Supported by

This study was supported by National Natural Science Foundation of China (grant number 52269021), the Red Willow Excellent Youth Project of Lanzhou University of Technology, and the Central Government Guides Local Science and Technology Development Fund Projects (23ZYQA0320).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025

摘要

针对液环泵叶轮轴向间隙泄漏流的复杂时空特性,设计径向向心、周向反向及对冲放电布局型式的等离子体激励对泄漏流进行控制,探究等离子体激励对间隙泄漏流的调控效果及干扰机理。研究结果表明,在三种布局型式等离子体流动控制下,泵的真空度变化不明显,但其轴功率降低、效率得到了一定程度的提升,其中周向反向对泵水力性能的调控效果更为显著且其对压缩区的中、高强度泄漏流动调控更具优势,而径向向心对过渡区的低强度泄漏流调控更具效果。三种布局型式等离子体激励均能够有效削弱压缩区始端附近的中强度泄漏流,其对压缩区末端附近高强度泄漏流抑制效果微弱;由于过渡区域泄漏较弱,等离子体激励诱导气流与低强度泄漏流相互耦合,会进一步加剧间隙内流动的复杂多变。对于非稳态间隙泄漏流动,周向反向具有更稳定的控制效果;在泄漏流未得到充分发展之前,径向向心对间隙泄漏流的抑制效果优于周向反向。研究成果可为液环泵性能优化提供理论和方法的参考。

本文引用格式

GUO Guangqiang , FENG Yijiang , ZHANG Renhui , CHEN Xuebing , JIANG Lijie , LI Rui’an . Mechanism Analysis of Controlling Axial Clearance Leakage Flow in Liquid-Ring Vacuum Pump by Plasma Actuation with Different Layouts[J]. 热科学学报, 2025 , 34(4) : 1257 -1270 . DOI: 10.1007/s11630-025-2180-8

Abstract

To address the complex spatiotemporal characteristics of impeller axial clearance leakage flow in a liquid-ring vacuum pump, plasma actuation with radial centripetal, circumferential reverse, and counter discharge layout types was designed to control the leakage flow. The regulation effects and interference mechanisms of plasma actuation on clearance leakage flow were explored. The results show that under plasma flow control of the three layout types, the vacuum degree of the pump changes not obviously, but the shaft power is reduced and the efficiency is improved to a certain extent. Among them, the circumferential reverse has a more obvious control effect on the hydraulic performance of the pump and has more advantages in controlling the medium- and high-intensity leakage flow in the compression zone, while the radial centripetal has a more effective control effect on the low-intensity leakage flow in the transition zone. All three layout types of plasma actuation can effectively weaken the medium-intensity leakage flow near the beginning of the compression zone, but their suppression effect on the high-intensity leakage flow near the end of the compression zone is weak. Due to the weak leakage in the transition region, the plasma actuation induced airflow and low-intensity leakage flow are coupled with each other, which will further aggravate the complexity and variability of the flow in the clearance. For unsteady clearance leakage flow, the circumferential reverse has a more stable control effect. About the control of medium-intensity leakage flow, the radial centripetal plasma actuation effect is better than the circumferential reverse. The research results can provide theoretical and methodological references for the performance optimization of liquid-ring vacuum pumps.

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