Comparison of heat transfer characteristics in surface cooling with boiling microjets of water, ethanol and HFE7100

被引：20

作者：

Muszynski, Tomasz ^{[1
]}

Mikielewicz, Dariusz ^{[1
]}

机构：

[1] Gdansk Univ Technol, Dept Energy & Ind Apparat, Fac Mech Engn, PL-80233 Gdansk, Poland

来源：

APPLIED THERMAL ENGINEERING | 2016年 / 93卷

关键词：

Microjets; Heat transfer intensification; Evaporating film; SINGLE-PHASE; JET; FLUX; CONVECTION; DEVICES; ARRAY;

D O I：

10.1016/j.applthermaleng.2015.08.107

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The basis of microjet technology is to produce jets which impinge the surface at the stagnation point with a very high kinetic energy. Main objective of this paper was to investigate the physical phenomena occurring on solid surfaces upon impingement of the single microjet in case of three fluids, namely water, ethanol and HFE7100. Intense heat transfer in the impact zone of microjet has been examined and described with precise measurements of thermal and flow conditions of microjets. Applied technology of jet production can result with the size of jets ranging from 20 to 500 mu m in breadth and 20 to 100 mu m in width. Reported tests were conducted under steady state conditions for surface cooling by single microjet producing an evaporating film. Obtained data have been used to validate authors own semi-empirical model of surface cooling by evaporating microjet in the stagnation point. Obtained database of experimental data with analytical correlations allows the rational design of microjet modules for various industrial applications. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：1403 / 1409

页数：7

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