抵抗低減界面活性剤水溶液の円管内流れにおける伝熱促進(熱工学,内燃機関,動力など)

概要

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An experiment was conducted to investigate the drag-reduction and the heat transfer characteristics in a surfactant water solution flow. It was confirmed that the percentage of the drag-reduction was more than 70% and simultaneously, the heat transfet coefficient was reduced at the same rate. In order to promote the heat transfer for the surfactant water solution flow, an enhancement method using a triangular rib was proposed. Comparing with the case whithout rib, it was found that the dependence of the drag-reduction and the heat transfer characteristics on Re and C was similar, but the critical Reynolds number at which the drag reduction reaches a maximum was smaller. Further, by the performance evaluation based on a constant pump power, it was verified that the compound method by the surfactant and the triangular rib is effective to improve the performance of heat exchangers.
社団法人日本機械学会の論文
2002-10-25