460 伝熱ダクト内流体の対流熱伝達促進と圧力低減対策に関する数値解析による研究(スリット付挿入板を設置した場合)(熱交換器,環境保全型エネルギー技術)

概要

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This present paper attempts to numerically estimate heat transfer enhancement and pressure drop decrease on a duct flow system of heat exchanger. Inserted plates inside the duct flow are proposed in order to enhance heat transfer coefficient, however the inserted plates cause a significant pressure drop, In order to decrease the pressure drop, the inserted plates with slits were employed. Numerical calculations of two-dimensional, laminar, and steady state conditions of duct flow with and without inserted plates were carried out. Air, as a heated media, with range of velocities 0.5m/s-1.5m/s and ambient temperature 20℃ was heated by using 50℃ isothermal duct wall. The calculation results show that the setting of inserted plates enhances the heat transfer coefficient significantly but pressure drop also increase. The presence of slits hole in the inserted plates decreases the pressure drop significantly but the heat transfer coefficient decrease slightly. The calculated streamlines, isotherms, vector velocity, local and average heat transfer coefficient, total heat transfer, and required fan power (pressure drop) are presented.
社団法人日本機械学会の論文
2005-07-06