非均一に加熱される流路の熱伝達に対するふく射伝熱の影響

概要

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This paper deals with the effects of surface radiation on the heat transfer of a circumferentially nonuniformly heated duct. The fluid is a non-participating medium of radiation. A numerical calcuation was performed to determine the heat transfer characteristics for laminar and turbulent flows in rectangular and circular ducts, the walls of which were assumed to be gray. The total heat transfer rate of the heated region is enhanced by the radiant heat transfer ; however, the convective heat transfer characteristics are little affected. An approximate method to obtain both the radiant heat flux and the wall temperature of the heated region is proposed. This method is useful for estimating the critical heat flux of the duct. It is shown that specular reflection of walls has little effect on the radiation heat transfer.
一般社団法人日本機械学会の論文
1986-04-25