大きな再循環流を伴う円筒容器内の乱流特性 : 温度場を伴った流動場の測定

概要

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The characteristics of turbulence in the fields of velocity and temperature of the upper plenum of LMFBR have been investigated to estimate the behavior of thermal diffusion near the upper core structure (UCS). An inlet nozzle of a 1/20 scale experimental vessel provided a co-axial water jet with temperature distribution. The two component velocity measurements were carried out by 3 beam laser Doppler velocimetry, where the temperature was simultaneously measured to obtain correlations among fluctuations of velocity and temperature. The results indicated that the higher temperature jet flow did not mix with colder surroundings up to the bottom. Sufficient turbulent mixing of momentum and heat was realized after the separation at the edge of UCS bottom, since the higher temperature jet flowed slantingly to the lower temperature surrounding jet.
社団法人日本機械学会の論文
1986-02-25