대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제41권1호
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  • Pages.1-8
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  • 2017
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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물의 포화풀비등에서 다발효과를 평가하기 위한 실험식 개발

Development of an Empirical Correlation to Evaluate the Bundle Effect in Saturated Pool Boiling of Water

  • 투고 : 2016.06.24
  • 심사 : 2016.10.30
  • 발행 : 2017.01.01
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초록

대기압 하에서 포화 상태를 유지하는 물의 내부에 잠긴 탠덤 튜브에 적용하기 위한 실험적 상관식을 새롭게 개발하였다. 상관식은 다발효과를 계산하기 위한 것으로 실험에서 측정한 값과 최소자승법을 사용하여 결정하였다. 상관식의 적절함을 평가하기 위해 통계분석을 수행하였다. 상관식은 실험값을 ${\pm}8%$ 범위 내에서 잘 예측함을 확인하였다. 상관식의 적용 범위는 피치=28.5~114mm, 방위각=$0^{\circ}{\sim}90^{\circ}$, 경사각=$0^{\circ}{\sim}90^{\circ}$, 상부 및 하부 튜브 열유속=$0{\sim}120kW/m^2$이다.

A new empirical correlation was developed for application to the tandem tubes for saturated water at atmospheric pressure. The correlation was obtained by using experimental data and the least square method to calculate the bundle effect. A statistical analysis was performed to identify the suitability of the correlation. The correlation predicted the experimental data within ${\pm}8%$. The applicable ranges of the correlation correspond to a tube pitch of 28.5~114 mm, an elevation angle of $0^{\circ}{\sim}90^{\circ}$, an inclination angle of $0^{\circ}{\sim}90^{\circ}$, and heat fluxes of $0{\sim}120kW/m^2$ of the lower and upper tubes.

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