Modeling of axially and transversely injected precursor droplets into a plasma environment

被引：38
作者：
Ozturk, A [1 ]
Cetegen, BM [1 ]
机构：
[1] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2005年 / 48卷 / 21-22期
关键词：
droplet vaporization modeling; plasma spraying; ceramic coatings; solution precursor plasma spray;
D O I：
10.1016/j.ijheatmasstransfer.2005.05.015
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Transport model of droplets injected axially or transversely into a plasma jet is presented. The droplets contain a ceramic precursor that precipitates in the vaporizing droplets. Droplet temperature and solute concentration distributions were predicted to estimate precipitation zones based on a homogeneous nucleation hypothesis. Effects of droplet size, injection velocity and injection angle were parametrically studied and the results were compared for axial and transverse injection. Axial injection is found to result in more rapid heat-up and precipitation than transverse injection. Computations suggest that small droplets form solid spherical particulates whereas larger droplets may form cenospheres and thin shell structures. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4367 / 4383
页数：17
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