排灌机械工程学报
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排灌机械工程学报  2019, Vol. 37 Issue (8): 692-698    DOI: 10.3969/j. issn.1674-8530.19.0144
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Numerical prediction of thermo-hydrody-namics on the gas-lubricated filmin wedge-shaped microchannel
ZHANG Xueqing1*, ZHANG Yangang1, CHEN Qinghua2, LIU Juanfang2
1. School of Energy and Power Engineering, North University of China, Taiyuan, Shanxi 030051, China; 2. Key Laboratory of Low-grade Energy Utilization Technologists and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing, 400030, China
Numerical prediction of thermo-hydrody- namics on the gas-lubricated film in wedge-shaped microchannel
ZHANG Xueqing1*, ZHANG Yangang1, CHEN Qinghua2, LIU Juanfang2
1. School of Energy and Power Engineering, North University of China, Taiyuan, Shanxi 030051, China; 2. Key Laboratory of Low-grade Energy Utilization Technologists and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing, 400030, China
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摘要 One wedge-shaped microchannel was established, and the hydrodynamic properties of the wedge-shaped gas film were comprehensively investigated. The Navier-Stokes equations coupled with the full energy equation were adopted to mainly analyze the lubrication hydrodynamics of the gas film, as the horizontal plate was viewed as the adiabatic wall or the horizontal plate temperature was equal to the tilt plate temperature. A higher gas film temperature strengthened the rarefaction effect, and the more rarefied gas weakened the squeeze. Meanwhile, the vertical flow across the gas film could indicate the relation between the velocity vector and the gas film squeeze and expansion. The adiabatic horizontal plate could resist the heat conduction and enhance the rarefaction effect, and thus the direction of motion of the gas molecules was easier to be changed.
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ZHANG Xueqing*
ZHANG Yangang
CHEN Qinghua
LIU Juanfang
关键词thermo-hyrodynamics   Navier-Stokes equations   adiabatic horizontal plate   wedge-shaped gas-lubricated film     
Abstract: One wedge-shaped microchannel was established, and the hydrodynamic properties of the wedge-shaped gas film were comprehensively investigated. The Navier-Stokes equations coupled with the full energy equation were adopted to mainly analyze the lubrication hydrodynamics of the gas film, as the horizontal plate was viewed as the adiabatic wall or the horizontal plate temperature was equal to the tilt plate temperature. A higher gas film temperature strengthened the rarefaction effect, and the more rarefied gas weakened the squeeze. Meanwhile, the vertical flow across the gas film could indicate the relation between the velocity vector and the gas film squeeze and expansion. The adiabatic horizontal plate could resist the heat conduction and enhance the rarefaction effect, and thus the direction of motion of the gas molecules was easier to be changed.
Key wordsthermo-hyrodynamics   Navier-Stokes equations   adiabatic horizontal plate   wedge-shaped gas-lubricated film   
收稿日期: 2018-01-09;
引用本文:   
ZHANG Xueqing*,ZHANG Yangang,CHEN Qinghua等. Numerical prediction of thermo-hydrody-namics on the gas-lubricated filmin wedge-shaped microchannel[J]. 排灌机械工程学报, 2019, 37(8): 692-698.
ZHANG Xueqing*,ZHANG Yangang,CHEN Qinghua et al. Numerical prediction of thermo-hydrody- namics on the gas-lubricated film in wedge-shaped microchannel[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(8): 692-698.
 
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