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http://dx.doi.org/10.3795/KSME-B.2013.37.9.863

Numerical Study on Cavitation Reduction in Velocity-Control Trim of Valve with High Pressure Drop  

Kim, Dae Kwon (Department of Mechanical Engineering, Sejong Univ.)
Sohn, Chae Hoon (Department of Mechanical Engineering, Sejong Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.37, no.9, 2013 , pp. 863-871 More about this Journal
Abstract
Flow characteristics of velocity-control trim in a valve is investigated numerically with high pressure drop. A basic trim widely used for a valve in domestic powerplants is selected and designed for a baseline of velocity-control trim. The numerical analysis is focused on flow rate and cavitation with the basic trim. For a condition of high-pressure drop, pressure drop between inlet and outlet and fluid temperature are selected to be 18.1 MPa and $160^{\circ}C$, respectively, which are typical ones considering operating conditions adopted in powerplants. With this baseline model and condition, design changes are made for improvement of flow rate and cavitation phenomenon. For re-design, trim is divided into three zones in radial direction and design parameters of flow area, stage, and flow direction are considered in each zone. With these combined parameters applied to each zone, 4 models with design changes are proposed and their flow rates and cavitation areas are investigated. From comparison with those in the baseline model of a basic trim, proposed models show better performance in both flow rate and cavitation.
Keywords
Cavitation; Velocity Control; Valve Trim; High Pressure Drop;
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Times Cited By KSCI : 2  (Citation Analysis)
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