Heat transfer and fluid flow characteristics of two-phase impinging jets

被引：27

作者：

Choo, Kyosung ^{[1
]}

Kim, Sung Jin ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Sch Mech Aerosp & Syst Engn, Taejon 305701, South Korea

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2010年 / 53卷 / 25-26期

关键词：

Two-phase; Impingement; Heat transfer; PRESSURE-DROP; GAS;

D O I：

10.1016/j.ijheatmasstransfer.2010.08.013

中图分类号：

O414.1 [热力学];

学科分类号：

070201 [理论物理];

摘要：

Heat transfer and fluid flow characteristics of two-phase impinging jets were experimentally investigated under a fixed pumping power condition. The effects of dimensionless pumping power (P-pump* = 1.4 x 10(11)-2.8 x 10(12)) and the volumetric fraction (beta = 0.0-1.0) on the Nusselt number were considered. Air and water were used as the test fluids. The results showed that the Nusselt number increased with volumetric fraction, attained a maximum value at around 0.2-0.3 of the volumetric fraction, and then decreased. By observing flow patterns, the optimum value of the Nusselt number was found to be in the bubbly flow region. Based on the experimental results, correlations for the normalized stagnation and average Nusselt numbers of impinging jets were developed as a function of the volumetric fraction alone. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：5692 / 5699

页数：8

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