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| 层流与湍流等离子体冲击射流特性比较 | |
| 引用本文： | 王海兴,陈熙,潘文霞,程凯.层流与湍流等离子体冲击射流特性比较[J].工程热物理学报,2007,28(4):652-654. |
| 作者姓名： | 王海兴 陈熙 潘文霞 程凯 |
| 作者单位： | 1. 北京航空航天大学宇航学院,北京,100083 2. 清华大学工程力学系,北京,100084 3. 中国科学院力学研究所,北京,100080 |
| 摘 要： | 本文采用数值模拟方法,对层流与湍流氩等离子体射流在空气环境中冲击平板时的流动与传热特性进行了对比研究.结果表明,在平板和射流进口间的距离较大时,平板的存在只对其附近的射流参数分布有较大影响,层流等离子体冲击射流的温度与轴向速度的轴向梯度明显小于湍流等离子体冲击射流情形;由于在平板表面形成的径向壁面射流对引射的附加贡献,层流和湍流等离子体冲击射流对环境空气的引射量明显增加. |
| 关 键 词： | 热等离子体 层流与湍流等离子体 冲击射流 数值模拟 |
| 文章编号： | 0253-231X(2007)04-0652-03 |
| 修稿时间： | 2007年1月12日 |
COMPARISON OF THE CHARACTERISTICS OF LAMINAR AND TURBULENT IMPINGING PLASMA JETS |
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| WANG Hai-Xing,CHEN Xi,PAN Wen-Xia,CHENG Kai.COMPARISON OF THE CHARACTERISTICS OF LAMINAR AND TURBULENT IMPINGING PLASMA JETS[J].Journal of Engineering Thermophysics,2007,28(4):652-654. | |
| Authors: | WANG Hai-Xing CHEN Xi PAN Wen-Xia CHENG Kai |
| Abstract: | Modeling study is performed to compare the flow and heat transfer characteristics of laminar and turbulent argon plasma jets impinging normally upon a flat plate(workpiece)in ambient air.It is found that when the plate standoff distance is comparatively large,the effect of the plate on the jet parameters only appears in the region near the plate,and the axial decaying-rates of the plasma temperature and axial velocity along the axis of the laminar plasma impinging-jet are appreciably less than their turbulent counterparts.The radial wall jet formed on the plate surface appreciably enhances the mass flow rate of the ambient air entrained into the laminar or turbulent impinging plasma jet. |
| Keywords: | thermal plasma laminar and turbulent plasma impinging jet modeling |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |