電場による固気混相管内乱流の伝熱制御

概要

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An experimental study has been conducted on the heat-transfer enhancement in a turbulent flow in which the motion of electrically charged solid particles was controlled by an electric field. The gas-solid suspensions consisting of 48.9μm glass beads and air flowed vertically downward in a circular pipe, and a steady electric field was applied radially. Measurements on pressure drop and heat transfer were made, changing the Reynolds number from 5200 to 12000, the loading ratio from 0 to 0.6, and the applied potential 0 to 6kV. It was found that both the pressure drop and the Nusselt number increase with increasing applied potential and loading ratio. The maximum Nusselt number obtained in the experiment was about 1.8 times as large as that without an electric field. The mechanism of the heat-transfer enhancement was discussed, and its dependence of the Reynolds number was explained in terms of the interaction between particles and the gas phase.
一般社団法人日本機械学会の論文
1990-05-25