管内高温域噴霧流による冷却に関する研究 : 第1報,解析的検討

概要

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In order to apply the large heat capacity of a two-phase mist flow for the purpose of uniform and soft cooling of high-temperature surfaces, the effects of mass flow rate, mass flow quality, liquid droplet diameter and heat flux on an increase rate of the fluid temperature are investigated numerically in the tube. The results indicate that newly defined coefficient of temperature increase becomes small for a smaller droplet diameter than 200 microns and for thee low inlet quality. A simple expression of the relation between the coefficient and the above-mentioned parameters, including the effect of temperature dependence of fluid properties, is obtained for the thermally developed region of the tube. The initial values of gas temperature and relative velocity between the droplet and the gas phase influence the coefficient mainly at the entrance region of the tube.
社団法人日本機械学会の論文
1989-05-25