喷嘴安装角对横向气流中雾化液滴粒径影响的研究  

Influence of Swirl Nozzle's Setting Angle on Droplet Size Distribution in Cross Airflow Field

作　　者：杨亭鹏[1] 吴伟亮[2] 

机构地区：[1]中国船舶重工集团公司第七研究院,北京100192 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《动力工程学报》2010年第9期668-672,共5页Journal of Chinese Society of Power Engineering

摘　　要：建立了旋流喷嘴雾化的数值计算模型,将计算结果与静止大气环境下液滴粒径的试验数据进行了对比,证明该数值计算模型的准确性.利用数值计算方法,研究了旋流喷嘴在不同安装角下,喷雾进入横向气流场后液滴Sauter直径(SMD)的变化规律,给出了喷嘴出口下游矩形管道中不同截面上雾化液滴粒径的分布情况.结果表明:对于压力旋流喷嘴,安装角与液滴统计粒径呈多值关系;随着喷嘴安装角的增大,液滴粒径的分布变宽.Numerical models for atomization simulation of swirl nozzles were built, based on which the calculation results of droplet size were compared with that of the experiment performed under atmospheric static conditions, and thus the accuracy of the numerical models was proved. Using numerical calculation algorithm, the variation law of droplet Sauter mean diameter（SMD） in the cross flow field at different setting angles of swirl nozzle was studied, and hence the droplet size distribution obtained at different sections of rectangular pipe in the nozzle downstream. Results show that for pressure swirl nozzles, the setting angle has a multivalued relation with statistical droplet size; with the rise of setting angles, the droplet size distribution is widened.

关 键 词：旋流喷嘴 安装角 横向气流 雾化液滴 Sauter直径 

分 类 号：TK121[动力工程及工程热物理—工程热物理]