闪烁
阀体孔板
喷嘴
过热
机械
喷射(流体)
风速计
材料科学
喷油器
努森数
蒸发
相(物质)
多普勒效应
光学
湍流
物理
热力学
机械工程
天文
冶金
工程类
量子力学
作者
Dilek Yıldız,Patrick Rambaud,Jeroen van Beeck,Jean‐Marie Buchlin
标识
DOI:10.1115/fedsm2006-98255
摘要
A flashing phenomenon is often met in liquid propulsion of safety fields in industrial environments. This violent evaporation occurs when a liquid finds itself suddenly in a thermodynamic non-equilibrium and becomes superheated. To investigate theoretically the source processes and validate models for design and safety assessments, knowledge of accurate and reliable data such as distribution of droplet size, velocity and temperature in the closest field of flashing occurrence is mandatory. In this present work, an experimental study is undertaken in order to characterize the two-phase jet after a sudden accidental release and aims to quantify the effects of initial conditions such as initial storage pressure, temperature, geometrical effects of the release points etc on the spray characteristics. To fulfil this goal, a laser-based optical technique like Phase Doppler Anemometry (PDA) is used to obtain information for particle diameter and velocity evolution in this harsh environment. Cases for different initial pressures, temperatures and orifice diameters are studied and the droplet size and velocity evolution are presented in function of initial parameters.
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