원관 주위의 대류 열전달에 대한 복합 열전달

Conjugated heat transfer on convection heat transfer from a circular tube in cross flow

  • 이승홍 (부산대학교 기계공학부) ;
  • 이억수 (부산대학교 기계기술연구) ;
  • 정은행 (부산대학교 대학원 기계설계공학과)
  • 발행 : 1998.09.01

초록

The convection heat transfer on horizontal circular tube is studied as a conjugated heat transfer problem. With uniform heat generation in a cylindrical heater placed in a cross flow boundary condition, heat flow that is conducted along the wall of the heater creates a non-isothermal surface temperature and non-uniform heat flux distribution. In the present investigation, the effects of circumferential wall heat conduction on convection heat transfer are investigated for the case of forced convection around horizontal circular tube in cross flow of air and water. Non-dimensional conjugation parameter $ K^*$ which can be deduced from the governing energy differential equation should be used to express the effect of circumferential wall heat conduction. Two-dimensional temperature distribution$ T({\gamma,\theta})$ is presented. The influence of circumferential wall heat conduction is demonstrated on graph of local Nusselt number.

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