新型多级降压喷嘴内流动特性的数值模拟  

Numerical Simulation of flow characteristics in a new-type multistage nozzle of pressure drop

作　　者：姚春兴 毛羽[2] 王娟[2] 蒋涛[2] 

机构地区：[1]中国石油天然气管道局第五工程公司,河北廊坊065000 [2]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《炼油与化工》2013年第6期16-19,61,共4页Refining And Chemical Industry

基　　金：国家973项目2004CB217803

摘　　要：为了改进重油梯级分离工艺中制备的沥青颗粒密度小、质密疏松的状况,对颗粒制备系统中的喷嘴结构进行了改进。采用数值模拟方法,对不同喷嘴结构参数和操作参数下的流动特性和压力特性变化规律进行了研究。结果显示增大入口压力,增大一级节流段直径,减小二级喷口段直径,对内流场和压力的改善起到促进作用。For the purpose of improving the condition of high fluffiness and low packing density in asphalt particles,a new-structure nozzle was designed.In this paper,the performances of pressure and flowing were studied by numerical simulation method.By contrast,it shows it has the contributive effect of flow field and pressure by raising operating pressure,increasing the diameter of throttle and decreasing the diameter of orifice.

关 键 词：喷嘴 流动特性 压力 速度 

分 类 号：TH137.53[机械工程—机械制造及自动化]