The influence of nozzle-to-plate spacing on heat transfer and fluid flow of submerged jet impingement

被引：45

作者：

Choo, Kyosung ^{[1
]}

Friedrich, Brian K. ^{[1
]}

Glaspell, Aspen W. ^{[1
]}

Schilling, Karen A. ^{[1
]}

机构：

[1] Youngstown State Univ, Mech & Ind Engn Dept, Youngstown, OH 44555 USA

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2016年 / 97卷

关键词：

Jet impingment; Heat transfer; Submerged jet; IMPINGING JETS; GAS;

D O I：

10.1016/j.ijheatmasstransfer.2016.01.060

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, heat transfer and fluid flow characteristics of a submerged jet impinging on a flat plate surface are experimentally investigated. The working fluids are air and water. The effects of a wide range of nozzle-to-plate spacing (H/d = 0.1 40) on the Nusselt number and pressure at stagnation point are considered. The results show that the Nusselt number and pressure are divided into three regions; region (I) jet deflection region (H/d <= 0.6), region (II) potential core region (0.6 < H/d <= 7), and region (III) free jet region (7 < H/d <= 40). In region I, the Nusselt number and pressure drastically increase with decreasing the nozzle-to-plate spacing. In region II, the effect of the nozzle-to-plate spacing is negligible on the Nusselt number and pressure. In region III, the Nusselt number and pressure monotonically decrease with increasing the nozzle-to-plate spacing. Based on the experimental results, new correlations for the normalized stagnation Nusselt number and pressure are developed as a function of the nozzle-to-plate spacing alone. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：66 / 69

页数：4

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