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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
Tel:
86-571-87041360,87239525
Fax:
86-571-87239571
Add:
No.9 Gaoguannong,Daxue Road,Hangzhou,China
P.C:
310009
E-mail:
meem_contribute@163.com
Abstract: Damping holes were widely used in various hydraulic mechanical systems, with their apertures typically ranging from 0.3mm to 2mm.The flow of this tiny flow channel was different from that of conventional pipes, and the wall roughness has an important influence on its flow characteristics. Aiming at the problem of the above issue, the damping hole installed in the hydraulic solenoid reversing valve was taken as the research object, using the porous media layer (PML) to simulate the surface roughness of the damping hole. Firstly, the physical model of the damping hole was established, and the model was meshed using ICEM CFD software. Then, the fluid governing equation and the PML momentum equation were established to solve the viscous resistance coefficient and inertial resistance coefficient. Finally, the fluid simulation software Fluent was used to analyze the influence of wall roughness on the fluid flow characteristics of the damping holes, the length of the complete fluid development distance and the temperature rise of the fluid. The research results show that the resistance characteristics obtained by simulation are the same as those obtained by experiments in the literature, and the method of characterizing the wall roughness by using the value porous medium layer is feasible. Due to surface roughness, the resistance experienced by the fluid in the damping hole increases, resulting in a 2.25% increase in the pressure drop from the inlet to the outlet of the damping hole, and under the same boundary conditions, the damping hole with the PML is about 0.1mm longer than the complete development distance of the smooth damping hole, and the heat value of the wall is increased by 1.5% on average.
Key words: hydraulic electromagnetic reversing valve; wall roughness; porous medium layer (PML); flow in microchannel; fluid flow characteristics of damping hole; ICEM CFD software
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- Chinese Core Periodicals
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- Chinese Sci-tech Core Periodicals
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- SA, INSPEC Indexed
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- CSA: T Indexed
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2010 Zhejiang Information Institute of Mechinery Industry
Technical Support：Hangzhou Bory science and technology
