The validity of the Reynolds equation in spool valve analysis considering cavitation

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The purpose of this research is to investigate the validity of the Reynolds equation in spool valve analysis under cavitation. This study is carried out for a laminar and isothermal flow between a sleeve and spool with grooves. The pressure and lateral force obtained from the Reynolds equation and the Navier-Stokes equation are compared with variations of aspect ratio, cross sectional area, and number of grooves. The cavitation phenomenon is considered by using a cavitation model in the Navier-Stokes equation and the Reynolds cavitation boundary condition in the Reynolds equation. A large difference of more than 20% is found between the equations for a lateral force of spool valve with many grooves. It was found that the Reynolds equation is not suitable for calculation of a lateral force of the spool valve with multiple-grooves of which the width and depth are even larger than the clearance under cavitation
Publisher
TSINGHUA UNIV PRESS
Issue Date
2016-09
Language
English
Article Type
Article
Keywords

STOKES-FLOW; THIN-FILMS; MODEL; CFD; SURFACES; SEALS

Citation

FRICTION, v.4, no.3, pp.266 - 276

ISSN
2223-7690
DOI
10.1007/s40544-016-0125-7
URI
http://hdl.handle.net/10203/213503
Appears in Collection
ME-Journal Papers(저널논문)
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