Convective Heat Transfer Enhancement of a Rectangular Flat Plate by an Impinging Jet in Cross Flow

doi:10.1016/S1004-9541(14)60060-4

Abstract

Abstract: Experiments were carried out to study the heat transfer performance of an impinging jet in a cross flow. Several parameters including the jet-to-cross-flow mass ratio (X 2%-8%), the Reynolds number (Re_d 1434-5735) and the jet diameter (d 2-4 mm) were explored. The heat transfer enhancement factor was found to increase with the jet-to-cross-flow mass ratio and the Reynolds number, but decrease with the jet diameter when other parameters maintain fixed. The presence of a cross flow was observed to degrade the heat transfer performance in respect to the effect of impinging jet to the target surface only. In addition, an impinging jet was confirmed to be capable of enhancing the heat transfer process in considerable amplitude even though the jet was not designed to impinge on the target surface.

Key words: impinging jet, cross flow, convection heat transfer, heat transfer enhancement

摘要： Experiments were carried out to study the heat transfer performance of an impinging jet in a cross flow. Several parameters including the jet-to-cross-flow mass ratio (X 2%-8%), the Reynolds number (Re_d 1434-5735) and the jet diameter (d 2-4 mm) were explored. The heat transfer enhancement factor was found to increase with the jet-to-cross-flow mass ratio and the Reynolds number, but decrease with the jet diameter when other parameters maintain fixed. The presence of a cross flow was observed to degrade the heat transfer performance in respect to the effect of impinging jet to the target surface only. In addition, an impinging jet was confirmed to be capable of enhancing the heat transfer process in considerable amplitude even though the jet was not designed to impinge on the target surface.

关键词: impinging jet, cross flow, convection heat transfer, heat transfer enhancement

LI Guoneng, ZHENG Youqu, HU Guilin, ZHANG Zhiguo. Convective Heat Transfer Enhancement of a Rectangular Flat Plate by an Impinging Jet in Cross Flow[J]. Chin.J.Chem.Eng., 2014, 22(5): 489-495.

李国能, 郑友取, 胡桂林, 张治国. Convective Heat Transfer Enhancement of a Rectangular Flat Plate by an Impinging Jet in Cross Flow[J]. Chinese Journal of Chemical Engineering, 2014, 22(5): 489-495.

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