油冷却管の近似解法

概要

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This paper deals with a mathematical solution on the heat transfer of cooling pipe with constant temperature and laminar flow oil in it. The partial differential equation of temperature distribution and equations of velocity and of pressure gradient were derived, as the viscosity of oil varies only with temperature and other properties of oil remain unchanged. I have attempted to solve these simultaneous equations. As the process I have taken in a conception of thermal boundary layer, and introduced a thermal equation corresponding to the Karman's momentum equation of boundary layer problems. The calculations of mean temperature θ_m were compared with my experimental results, although sufficient coincidence is difficult to obtain, for these were thermal experiments, but I have recognized that this theory and the experiments agree with each other. Moreover, I am of the opinion that we could ascertain the effect of s' and K following my similarity.
社団法人日本機械学会の論文
1958-12-25