標題: Jet impingement heat transfer on target surfaces with longitudinal and transverse grooves
作者: Liu, Yao-Hsien
Song, Siao-Jhe
Lo, Yuan-Hsiang
機械工程學系
Department of Mechanical Engineering
公開日期: 1-三月-2013
摘要: This work reports detailed impingement heat transfer measurements on grooved surfaces using transient liquid crystal method. These grooves are machined on the target surfaces with either parallel or orthogonal to the exit flow direction, and are aligned either with the jet holes (inline pattern) or between the jet holes (staggered pattern). The jet-to-target plate spacing (Z/d) is 3 and the average jet Reynolds numbers are from 2500 to 7700. Results show that heat transfer is enhanced near grooves. However, the grooves underneath the jet holes hinder the impingement flow and the jet impingement heat transfer is reduced. Although local heat transfer shows distinct distributions, there is no significant difference in overall/averaged Nusselt numbers on the grooved surfaces and the highest heat transfer enhancement by grooved surfaces is 15%. (C) 2012 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.11.042
http://hdl.handle.net/11536/21182
ISSN: 0017-9310
DOI: 10.1016/j.ijheatmasstransfer.2012.11.042
期刊: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume: 58
Issue: 1-2
起始頁: 292
結束頁: 299
顯示於類別:期刊論文


文件中的檔案:

  1. 000315001800030.pdf