618 水平円柱におけるヘリウムガスの定常及び非定常強制対流熱伝達における発熱率上昇周期及び試験発熱体直径の影響(GS-6 熱工学(2))

概要

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The knowledge of forced convection transient heat transfer at various periods of exponential increase of heat input to a heater is important as a database for understanding the transient heat transfer process in a high temperature gas cooled reactor (HTGR) due to an accident in excess reactivity. The transient heat transfer coefficients for forced convection flow of helium gas over a horizontal cylinder were measured using a forced convection test loop. The platinum heaters with diameters of 0.7mm, 1.0mm, 2.0mm are heated by electric current with an exponential increase of Q_0exp(t/π). It was clarified that the heat transfer coefficient decreases when the diameter of test heater becomes larger, and it increases when the diameter of test heater becomes smaller. Semi-empirical correlations for quasi-steadystate and transient heat transfer were developed based on the experimental data.
社団法人日本機械学会の論文
2004-03-17