혼합날개가 부착된 6×6 봉다발 부수로에서의 열전달 향상을 위한 실험적 연구

변선준; 신용철; 민경호; 방윤곤; 채영종

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자료유형: 학술저널

저자정보: 변선준 신용철 민경호 방윤곤 채영종

저널정보: 한국기계기술학회 한국기계기술학회지 한국기계기술학회지 제17권 제2호

발행연도: 2015.1

수록면: 231 - 237 (7page)

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연구배경

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연구결과

초록· 키워드

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The present experimental study investigates single-phase heat transfer coefficients downstream of support grid in 6×6 rod bundles. Support grid with Split mixing vanes enhance heat transfer in rod bundles by generating turbulence but this turbulence is confined to a short distance. Support grid with large scale vortex flow(LSVF) mixing vanes enhanced heat transfer to a longer distance. In this study, the experiments were performed at reynolds numbers of 50,000. The characteristics of the heat transfer enhancement of the Split mixing vane and those of the LSVF mixing vane were compared. The results showed that the characteristics of the heat transfer enhancement of rods by the Split mixing vane were limited to 10 Dh after the spacer grid, but those by the LSVF mixing vane were maintained until 15 Dh after the spacer grid. For the reynolds number of 50,000, the heat transfer enhancement effect was 3.0%

#Heat transfer coefficient #열전달계수) #Fuel rod #연료봉) #Sub-channel #부수로) #Rod bundle #봉다발) #Mixing vane #혼합날개) #Reynolds number #레이놀즈수) #Spacer grid #지지격자) #대형 2차 와류) #Lager scale vortex flow #LSVF

참고문헌 (10)

참고문헌 신청

Blum, H. A / 1996 / Heat transfer in a decaying vortex system

Chang, S. K / 2008 / Phenomenological investigations on the turbulent flow structures in a rod bundle array with mixing devices / Nucl. Eng. and Design 238 : 600 ~ 609

Chang, S. K / 2014 / Turbulent mixing in a rod bundle with vaned spacer grids:OECD/NEA?KAERI CFD benchmark exercise test / Nucl. Eng. and Design 279 : 19 ~ 36

Dowe, D. S / 1973 / Measurement of turbulent velocity, intensity and scale in rod bundle flow channels containing a grid spacer / BNWL-1757

Holloway, M. V / 1996 / Calculation of tangential stresses at the wall in a channel and the velocity distribution in a turbulent flow of liquid / Atomic Energy 21 : 731 ~ 739

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