对撞式喷嘴在大气环境中喷雾实验与数值模拟  

Experiment and Simulation Studies on Impinging Nozzle in Atmospheric Environment

作　　者：王婕[1] 余永刚[1] 刘焜[1,2] 

机构地区：[1]南京理工大学能源与动力工程学院,南京210094 [2]上海齐耀动力有限公司,上海201213

出　　处：《弹道学报》2016年第2期47-52,共6页Journal of Ballistics

基　　金：教育部博士点基金项目(20113219110024)

摘　　要：为了研究对撞式喷嘴在大气环境中的喷雾特性,设计了对撞式喷嘴喷雾实验装置。采用相位多普勒粒子动态分析仪(PDA),测量了不同工况下含能液体模拟工质雾化场液滴的特征参数,获得了不同喷射压力下液滴索特尔平均直径D_(32)的分布规律以及喷雾场液滴轴向速度v_z沿轴向和径向的分布规律。在实验基础上,建立喷雾场二维非稳态简化模型,气相采用k-ε湍流模型,液滴破碎采用泰勒类比破碎模型。结果表明:喷雾场从起始到统计稳定的发展过程约需15 ms,液滴索特尔平均直径D_(32)的分布规律、轴向速度的计算值与实验结果基本吻合。To study the spray characteristics of impinging nozzle in atmospheric environment , the experiment device of impinging nozzle was designed .The distribution characteristics of the spray parameters in the spray field under different conditions were measured with PDA system .Sauter mean diameter（ D32 ） and axial velocity （ vz ） along the axial and radial direction were gained under different injection pressures .Based on the experiment results ,the two-dimensional unsteady simplified model was es-tablished .The gas phase was simulated by using k-ε turbulence model ,and Taylor analogy breakup model was used in simulating droplets ’ breakup .The results show that the time of the spray field being statistically stable takes about 15 ms.The simulated results of D32 and vz agree well with the experimental data .

关 键 词：液体火箭发动机 对撞式喷嘴 雾化特性 数值模拟 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]