Effect of small vortex-generators on scalar mixing in the developing region of a turbulent jet

被引：20
|
作者：
Mi, J [1 ]
Nathan, GJ [1 ]
机构：
[1] Univ Adelaide, Dept Mech Engn, Adelaide, SA 5005, Australia
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 1999年 / 42卷 / 21期
基金：
澳大利亚研究理事会;
关键词：
D O I：
10.1016/S0017-9310(99)00087-3
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This paper investigates the effect of small tabs placed at the exit plane of an axisymmetric smooth contraction on passive scalar mixing in a slightly heated turbulent jet. It is shown that the presence of tabs profoundly distorts the jet flow field and consequently modifies the scalar mixing characteristics significantly. Tabs cause the mean temperature to decrease more rapidly with downstream distance, implying an increased mixing rate. Furthermore, it is found that two tabs distort the jet from the axisymmetric state more dramatically than four tabs. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：3919 / 3926
页数：8
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