文献类型：期刊文献

中文题名：四喷嘴对置式撞击流的数值模拟

英文题名：Numeric Simulation of the Flow Field in Four Opposed Impinging Jets

作者：代正华[1];刘海峰[1];于广锁[1];龚欣[1];于遵宏[1]

机构：[1]华东理工大学洁净煤技术研究所,上海200237

年份：2004

卷号：30

期号：1

起止页码：65

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;EI(收录号：2004138091827);Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：国家863项目--新型水煤浆气化技术;国家重点基础研究发展规划(1999022103)

语种：中文

中文关键词：四喷嘴对置式撞击流;数值模拟;分区流动;回流比;喷口速度

外文关键词：nozzle; opposed impinging jets; numerical simulation

摘要：通过实验测量和数值模拟(Realizableκ-ε湍流模型)相结合的方法研究了四喷嘴对置式撞击流的流场,得到了两者相吻合的结果。模拟结果再现了装置内的分区流动情况;通过对模拟数据分析,计算出了回流比沿装置轴向的分布,发现喷嘴顶部高度和喷口速度的大小对顶部空间的回流比分布影响明显;而喷嘴顶部高度和喷口速度对喷嘴以下空间的回流比分布影响甚小,大约距喷嘴2倍装置直径距离后喷嘴以下空间回流消失。
The four impinging jets were studied by experiment and numerical simulation (two-equation realizable κ-ε turbulent model). The result of numerical simulation is consistent with that of experiment. It shows that realizable κ-ε turbulent model can be used to simulate multi-nozzle impinging jets. The (velocity) contour described the multi-zonal flow field in apparatus. From the data of numerical simulation, the reflux ratio of apparatus was achieved. Reflux ratio above the nozzle plain was affected evidently by the height above the nozzle and the nozzle velocity, but the change in reflux ratio below the nozzle plain was little and the reflux disappeared at double apparatus diameters below nozzle plain.