文献类型：期刊文献

中文题名：小间距两喷嘴对置撞击流流场的数值模拟与实验研究

英文题名：Numerical simulation and experimental study on flow field of two closely spaced 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,上海200237

年份：2007

卷号：58

期号：6

起止页码：1385

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;EI(收录号：20072710691819);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：两喷嘴对置撞击流;小喷嘴间距;驻点偏移;出口速度分布

外文关键词：two opposed jets; close nozzle separation; stagnation point offset; exit velocity profile

摘要：Experimental study and numerical simulation were performed for the averaged flow field of two closely spaced opposed jets with hot wire anemometer(HWA)and CFD software and the simulation was compared with the measurement and approximate analytic solution in the literature.The results showed that the exit velocity profile of the single jet was top-hat distribution due to the presence of boundary layers.At L<2D(where L is nozzle separation and D is nozzle diameter),bimodal distribution of exit velocity profile,low in the middle and high on both sides,was present,while such bimodal distribution of exit velocity profile was absent at L=2D.With increasing nozzle separation,the stagnation point offset of the impinging plane increased.With the same velocity ratio,stagnation point offset of the nozzles with uniform profiles was larger than that with top-hat profiles.The approximate analytic solution of the flow field of two opposed jets in the literature was only valid for the nozzles with uniform exit velocity profiles and the prediction accuracy became worse for the nozzles with top-hat exit velocity profiles.
Experimental study and numerical simulation were performed for the averaged flow field of two closely spaced opposed jets with hot wire anemometer （HWA） and CFD software and the simulation was compared with the measurement and approximate analytic solution in the literature. The results showed that the exit velocity profile of the single jet was top-hat distribution due to the presence of boundary layers. At L〈2D （where L is nozzle separation and D is nozzle diameter）, bimodal distribution of exit velocity profile, low in the middle and high on both sides, was present, while such bimodal distribution of exit velocity profile was absent at L=2D. With increasing nozzle separation, the stagnation point offset of the impinging plane increased. With the same velocity ratio, stagnation point offset of the nozzles with uniform profiles was larger than that with top-hat profiles. The approximate analytic solution of the flow field of two opposed jets in the literature was only valid for the nozzles with uniform exit velocity profiles and the prediction accuracy became worse for the nozzles with top-hat exit velocity profiles.