SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (5): 489-495.DOI: 10.1016/S1004-9541(14)60060-4

• 催化、动力学与反应工程 •    下一篇

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

李国能, 郑友取, 胡桂林, 张治国   

  1. Department of Energy and Environment System Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
  • 收稿日期:2012-12-26 修回日期:2013-06-21 出版日期:2014-05-28 发布日期:2014-05-06
  • 通讯作者: LI Guoneng,E-mail: 109026@zust.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China (51106140) and the Natural Science Foundation of Zhejiang Province (Z1110695).

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

LI Guoneng, ZHENG Youqu, HU Guilin, ZHANG Zhiguo   

  1. Department of Energy and Environment System Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
  • Received:2012-12-26 Revised:2013-06-21 Online:2014-05-28 Published:2014-05-06
  • Supported by:

    Supported by the National Natural Science Foundation of China (51106140) and the Natural Science Foundation of Zhejiang Province (Z1110695).

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 (Red 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

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 (Red 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