傾斜内壁をもつシャープターン往復流路内の乱流熱(物質)伝達(熱工学,内燃機関,動力など)

概要

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Flow and heat/mass transfer characteristics for turbulent flow in serpentine channels with an inclined partition wall have been examined experimentally. Detailed velocity distributions have been measured using Particle Image Velocimetry for three kinds of partition wall's inclination angle with respect to the outer walls (α=+4°, 0°, -4°) at Reynolds number of 3.5×10^4. The PIV measurements results were compared with the published local mass transfer results for these three cases, and the mechanism of the heat (mass) transfer from the channel wall after turn section were discussed. Based on these data, the inclination angle can bring significant changes to the fluid characteristics and local heat (mess) transfer characteristics. The heat (mass) transfer enhancement after turn is controlled by the value of secondary flow velocity, convective mean velocity, turbulent kinetic energy, and their contribution rates are remarkably changed by the channel configurations.
社団法人日本機械学会の論文
2004-07-25