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.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2012年第4期15-18,共4页
Ordnance Material Science and Engineering
关键词
Laval型喷嘴
雾化器
气流特性
液流特性
Laval nozzle
atomizer
gas flow characteristics
liquid flow characteristics
