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원전용 게이트 밸브의 성능특성 분석을 위한 유동해석 모델링 연구A NUMERICAL STUDY ON FLOW ANALYSIS MODELLING AND FUNCTIONAL CHARACTERISTICS FOR A GATE VALVE IN NUCLEAR POWER PLANTS

Other Titles
A NUMERICAL STUDY ON FLOW ANALYSIS MODELLING AND FUNCTIONAL CHARACTERISTICS FOR A GATE VALVE IN NUCLEAR POWER PLANTS
Authors
김재형임태묵이정희
Issue Date
2020
Publisher
한국전산유체공학회
Keywords
전산유체역학(CFD); 밸브손실계수(valve loss coefficient); 게이트밸브(gate valve); 마찰계수(friction coefficient); 주손실(major loss); 부손실(minor loss) 원자력발전소(Nuclear Power Plant)
Citation
한국전산유체공학회지, v.25, no.4, pp 74 - 84
Pages
11
Journal Title
한국전산유체공학회지
Volume
25
Number
4
Start Page
74
End Page
84
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/306
DOI
10.6112/kscfe.2020.25.4.074
ISSN
1598-6071
Abstract
The 3D flow analysis model on gate valve in nuclear power plant is made and validated by known experimental equation, which is the requirement of ASME QME-1 standard. The major loss on valve is calculated and compared to Swamee-Jain equation, where the error of pipe friction coefficient is within 7% error bound. The minor loss on valve is calculated but cannot be compared because of no experimental equation. So the orifice is inserted on pipe instead of valve and the differential pressure and flow rate is used to calculate the discharge coefficient (Cd value) with various size of flow passage. With the validated mesh and model, the flow analysis of gate valve was performed with changing stoke and reynolds number. The minor loss in valve is dominant when the valve is operated and the force on disk is larger with increasing reynolds number. Valve factor, which accounts the loss effect by differential pressure force, is calculated with the flow analysis result. The valve factor can be used in calculation of valve force in design and functional qualification.
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