Co-optimization and performance investigation of water ring vacuum pump impeller and casing profiles based on entropy production theory

IF 4.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2026-04-01 Epub Date: 2026-01-13 DOI:10.1016/j.vacuum.2026.115093

Qingyun Li , Haibo Sun , Guoyong Zhao , Yanjie Li , Shuo Yu , Jingyao Bian

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引用次数: 0

Abstract

The internal flow characteristics and hydraulic performance of water ring vacuum pumps are significantly affected by the impeller and casing profiles. To reduce energy losses and improve suction performance and efficiency, a multi-objective co-optimization of the impeller and casing profiles of a water ring vacuum pump is conducted by integrating experimental measurements with numerical simulations. First, a theoretical model of hydraulic losses in water ring vacuum pumps is established based on entropy production theory, revealing the underlying mechanisms of these losses. Subsequently, the flow fields and overall performance before and after optimization are compared through integrated suction-performance analysis. The effects of profile parameters on suction capacity and hydraulic losses are thereby revealed, providing a theoretical basis for the structural optimization of water ring vacuum pumps. Results indicate that, in the optimization model targeting minimal wall effect entropy production, the wall effect entropy production decreases by 15.14 %, accompanied by a 0.47 % improvement in isothermal compression efficiency. In the optimization model targeting maximum suction capacity, the suction capacity increases by 17.83 %, and the isothermal compression efficiency improves by 4.16 %.

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基于熵产理论的水环真空泵叶轮与机匣型线协同优化及性能研究

水环式真空泵的内部流动特性和水力性能受叶轮和机匣型线的影响较大。为了减少能量损失，提高吸力性能和效率，采用实验测量与数值模拟相结合的方法，对水环式真空泵叶轮和机匣型线进行了多目标协同优化。首先，基于熵产理论建立了水环真空泵水力损失的理论模型，揭示了水环真空泵水力损失的机理。随后，通过综合吸力性能分析，对比优化前后的流场和整体性能。揭示了外形参数对吸气量和水力损失的影响，为水环式真空泵结构优化提供了理论依据。结果表明，在以壁面效应熵产最小为目标的优化模型中，壁面效应熵产降低了15.14%，等温压缩效率提高了0.47%。在以最大吸力为目标的优化模型中，吸力提高17.83%，等温压缩效率提高4.16%。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.