マイクログルーブを有する高性能蒸発器に関する研究 : 単一グルーブの毛管力測定と熱物質輸送モデルの検証(熱工学,内燃機関,動力など)

概要

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A micro-grooved evaporator is composed of μm order width grooves on a heat transfer plate, in which the inter-line regions at the liquid vapor meniscus of coolant become specific. The high heat performance are realized by this inter-line region where the liquid thin film reduces thermal resistance on the heat transfer surface. In this report, we proposed a numerical simulation model of heat and mass transfer in a single groove to predict the capillary force and the heat flux in a single groove. In addition, the capillary force performances (capillary rise length in a groove) for a single groove of various width, superheat and inclination was measured. The measured capillary rise length became maximum at a specific groove width of 200〜400μm, which is in good agreement with the predicted results calculated by the proposed model. For the better prediction of capillary rise length, effective capillary force and, especially, effective flow resistance were considered.
社団法人日本機械学会の論文
2008-10-25