LNGタンク底面・側壁同時加熱時のタンク内伝熱流動モデル実験(熱工学,内燃機関,動力など)

概要

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Heat and fluid flow in a layer heated from the bottom and the side walls simulating underground LNG tank is experimentally studied under high Rayleigh number (7.5×10^<10><Ra<1.5×10^<13>) conditions by electrochemical mass transfer technique. From the experiment, following results are obtained. When side walls are heated, the heat transfer along the bottom surface is reduced. Heat transfer along sidewalls is independent of bottom heating, and is modeled by an equation for laminar natural convection flow even for Ra>10^9. And convective flow pattern in the tank is visualized by Schlieren technique. The results, combined with local mass transfer measurement, show that Sh is reduced in the area of the bottom surface impinging downward flow. It is caused by the suppression of plume formation by the downward flow.
社団法人日本機械学会の論文
2003-06-25