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김시범(Si-Pom Kim),전락원(Rock-Won Jeon),황일주(Il-Ju Hwang),이재훈(Jae-Hun Lee),강대기(Dae-Ki Kang) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.3
The packing, among the components comprising the gate valve, is used to sustain the air-tightness and the study on change of shape or pattern has been carried out to maximize the functions, but the study on changing the location or the size of the packing in a bid to prevent the freezing has rarely been implemented. Thus, This study is intended to evaluate the thermal strain of packing by heat transfer from territory of extremely low temperature as well as the temperature distribution to the upper part of the packing using numerical analysis method.
Thermal-structural Coupled Field Analysis for Fire Safety Type Ball Valve
김시범(Si-Pom Kim),이준호(Joon-Ho Lee),이권희(Kwon-Hee Lee),전락원(Rock-Won Jeon),도태완(Tae-Wan Do) 한국기계가공학회 2011 한국기계가공학회지 Vol.10 No.3
The safety of transporting equipment in a cryogenic condition is one of important problems under the circumstances that the application weight of natural gas is gradually increasing. As a larger disaster may be generated by leakage of oil or gas from valves in case of fire occurrence of a ship, the present research applied a numerical analysis method on thermal stress distribution and deformation, etc. to the design of ball valves satisfying fire safety test’s specification(API607) to prevent this. In addition, the present research progressed fire safety tests and compared the test result with numerical analysis results. The Max stress by parts was confirmed through thermal analysis of major parts to evaluate safety. The fire safety test was progressed according to the regulation of API607.
이재훈(Jae-Hun Lee),김시범(Si-Pom Kim),전락원(Rock-Won Jeon),이근호(Geun-Ho Lee) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.1
Various type of valves are manufactured for different industrial uses. Among them, check valves are used to allow fluid to flow in one direction but not in the opposite direction. There are many different types of check valves, but Y-shaped check valves are widely used these days. Not many studies have been carried out on Y-shaped check valves and the flow coefficients obtained through numerical analysis have the problem of low reliability. In order to solve this problem, this study performed flow analysis, flow-structure coupled analysis, and flow coefficient measurement experimentally, and through these analyses derived and verified the flow coefficients and assessed the structural safety based on numerical analysis.