文献类型：期刊文献

中文题名：两喷嘴对置撞击流驻点偏移规律

英文题名：Stagnation point offset of two opposed jets

作者：李伟锋[1];孙志刚[1];刘海峰[1];王辅臣[1];于遵宏[1]

机构：[1]华东理工大学资源与环境工程学院煤气化教育部重点实验室,上海200237

年份：2008

卷号：59

期号：1

起止页码：46

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;EI(收录号：20080811110661);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：教育部新世纪人才支持计划项目(NCET-05-0413);国家重点基础研究发展计划项目(2004CB217703)~~

语种：中文

中文关键词：撞击流;驻点偏移;稳定性;烟线法;热线风速仪

外文关键词：impinging jets; stagnation point offset; stability; smoke-wire technique; hot-wire anemometer

摘要：运用烟线法和热线风速仪对两喷嘴撞击流流场进行了实验研究,考察了不同喷嘴间距、不同气速比下撞击面的稳定性和撞击面驻点的偏移规律。结果发现,当2D≤L≤4D(L为喷嘴间距,D为喷嘴直径)时,若两喷嘴气速相等,撞击面不稳定,在轴线上发生振荡;当两喷嘴气速有小的差异时,撞击面驻点将发生大幅度的偏移,此时流场变得相对比较稳定。当2D≤L≤8D时,撞击面驻点位置对气速比变化很敏感;当L<2D和L>8D时,撞击面驻点位置对两喷嘴气速比的变化逐渐变得不敏感。
The flow field of two opposed jets was experimentally investigated with the smoke-wire technique and hot-wire anemometer for the stability of impingement plane and stagnation point offset at various nozzle separations and exit velocity ratios. The results showed that at 2D≤L≤4D （where L is nozzle separation and D is nozzle diameter）, the impingement plane was instable and oscillated at equal exit velocities, while the impingement plane deviated from the mid-point to a large extent and the flow field became stable comparatively at a small difference of exit velocities. At 2D≤L≤8D, the stagnation position was very sensitive to the change of velocity ratio; while at L〈2D or L〉8D, the position of stagnation point became insensitive to the change of exit velocity ratio.