コロナ放電を利用した対流伝熱の促進　流れと平行なワイヤ電極配置に対する理論解析

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  • Heat transfer enhancement in a convective field with corona discharge. Analytical study for parallel wire-electrode arrangement.
  • コロナ ホウデン オ リヨウシタ タイリュウ デンネツ ノ ソクシン ナガレ

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In conjunction with the experimental studies, the analytical studies have been undertaken aimed at deeper and accurate understanding of the heat transfer enhancement phenomena by applying ionic wind in a channel flow. The positive wire-electrodes were set in parallel to the primary flow direction, and an electric field was applied. A theoretical analysis was performed on electric, flow, and temperature fields taking account of the interactions among them. By comparing the experimental results with the analytical results, the flow combined with the longitudinal vortex motions was clearly defined in relation to the applied voltage, the primary flow velocity, and the wire-spacing. The mechanism of heat transfer enhancement was found to correspond positively to the combined flow. The characteristics of heat transfer were also observed to be in connection with the arrangement of wire-electrodes such as the wire-spacing in spanwise and the wire-offset ratio in the channel height direction.

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