Laval型雾化器气液流动特性研究  

Gas-liquid flow characteristics of Laval atomizer

作　　者：司朝润[1] 张贤杰[1] 王俊彪[1] 

机构地区：[1]西北工业大学陕西省数字化制造工程技术研究中心,陕西西安710072

出　　处：《兵器材料科学与工程》2012年第4期15-18,共4页Ordnance Material Science and Engineering

摘　　要：喷嘴出口气流速度和气液质量流率比是影响液态金属雾化效果的两个主要因素。为改善雾化效果,对现有环缝型雾化器进行改进,出口采用Laval型。建立了喷嘴出口速度、气体与金属质量流率的表达式,获得稳定气、液质量流率比的坩埚背压与金属液面高度的关系。通过实验方法建立了采用限制型Laval喷嘴导流管出口负压值与雾化压力之间的关系。Gas velocity of nozzle outlet and gas-liquid mass flow ratio have a great influence on the atomization efficiency of liquid metal. In this paper, Laval shape was adopted for the nozzle outlet to obtain supersonic gas velocity. The mathematical expressions of gas exit velocity, gas and liquid mass flow ratio were established to characterize the flow of gas and melted metal of the crucible and fluid conduit system. The relationship between the pressure of fluid conduit outlet and the atomizing gas pressure was obtained by experimental method.

关 键 词：Laval型喷嘴 雾化器 气流特性 液流特性 

分 类 号：TQ021.1[化学工程]