Enhancement of jet-to-wall heat transfer using axisymmetric grooved impinging plates

被引：24
|
作者：
Sagot, B. [1 ]
Antonini, G. [2 ]
Buron, F. [1 ]
机构：
[1] ESTACA, Lab Fluide & Energet, F-92300 Levallois Perret, France
[2] UTC, Dept Genie Procedes Ind, F-60205 Compiegne, France
来源：
INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2010年 / 49卷 / 06期
关键词：
Jet impingement; Heat transfer enhancement; Groove; Nusselt number correlation; Constant wall temperature; FLAT SURFACE; IMPINGEMENT;
D O I：
10.1016/j.ijthermalsci.2009.12.011
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
An experimental investigation was carried out to examine the effects of axisymmetric lathe-worked grooves on the impinging jet-to-wall heat transfer, under constant wall temperature conditions. This study covers jet Reynolds numbers, based on the orifice diameter D, from 15 000 to 30 000, for a given jet-to-wall dimensionless distance H/D = 2. The grooves have either square or triangular cross-section, with depth c = 1 mm, and pitch p = 2 mm. Under these conditions, we obtained significant heat transfer enhancements, up to 81% as compared with the smooth plate reference case, for a value of the dimensionless plate radius R/D = 2, a jet Reynolds number Re(j) = 23 000, and for square cross-section lathe-worked grooves. (C) 2010 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：1026 / 1030
页数：5
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