Transactions of the Korean Society of Mechanical Engineers (대한기계학회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Natural Convection Heat Transfer from a Horizontal Heat Exchanger Tube with a Fin

單一핀을 가진 水平管에서의 自然對流 熱傳達

  • 정한식 (동아대학교 공대 기계공학과) ;
  • 권순석 (동아대학교 공대 기계공학과)
  • Published : 1987.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

An numerical and experimental study has been performed on natural convection heat transfer from a horizontal heat exchanger tube with a fin. At s bare tube, by increasing $C_{T}$ (tube conduction parameter), mean Nusselt number and outer wall temperature are apparently increased at $C_{T}$.leq.300, slightly increased at $C_{T}$>300 and they can be represented in an exponential function of $C_{T}$. Natural convection heat transfer characteristics for the tube with a fin at given Rayleigh number are well agreed by those for an isothermal cylinder at a modified Rayleigh number. The local fin Nusselt number of the tube with a downward fin is much higher than that of the tube with an upward fin. The comparisons between numerical and experimental results showed good agreement.reement.

본 논문에서는 수평관 내부의 체적평균온도를 가진유체의 난류강제대류에서 열전달이 일어나는 경우에 대하여 핀이 없는 수평전도관, 하향 핀이 부착된 수평전도 관 그리고 상향 핀이 부착된 수평전도관의 열전달 특성을 수치계산으로 연구하고 Mach -Zehnder 간섭계를 이용하여 실험하였고 수치해석과 실험결과를 비교하여 타당성을 확 인하였다.

Keywords