Wall Heat Conduction and Convection Heat Transfer from a Cylinder in Cross Flow

J. Ocean Eng. Technol. 2001;15(3):1-8.

원형 실린더 주위의 전도-대류 열전달

이상봉,이억수,김시영

부경대학교 대학원 제어기계공학과,부산대학교 기계기술연구소,부경대학교 기계공학부

Keywords: Local heat transfer coefficient, Two-dimensional temperature distribution, Circumferential wall heat conduction, Shape factor ${gamma}$$_{}$ o//b, Conductivity ratio $kappa$$_{}$ f//$kappa$$_{}$

핵심용어: 국소 열전달계수, 이차원 온도분포, 원주방향 열전도, 형상계수 ${gamma}$$_{}$ o//b, 열전도계수의 비$kappa$$_{}$ f//$kappa$$_{}$ $omega$/

Abstract

With uniform heat generation within the wall of the cylinder placed in a cross flow, heat flows by conduction in the circumferential direction due to the asymmetric nature of the fluid flow around the perimeter of the cylinder. The circumferential heat flow affects the wall temperature distribution to such an extent that in some cases significantly different results may be obtained for geometrically similar surfaces. In the present investigation, the effects of circumferential wall heat conduction on local convective heat transfer is investigated for the case of forced convection around horizontal cylinder in cross flow of air. Two-dimensional temperature distribution $T_w$/(${gamma}$,${ heta}$) is presented through the numerical analysis. The one-dimensional and two-dimensional solutions are in good agreement with experimental results of local heat transfer coefficients.