摘要
高温颗粒与冷液接触会引发剧烈的沸腾蒸发瞬变现象,涉及到工程安全,是一高速瞬变多相传热问题。本实验室设计建立了高温颗粒下落冷液沸腾可视化实验装置,初次实验将1个或有限几个高温球形颗粒坠入水中,利用高速摄像机记录其在冷液中的运动速度,证实了确实存在由周围冷液快速蒸发引起的作用在运动中高温颗粒上的特殊阻力,验证了高温颗粒的蒸发曳力模型。
Extremely high rapid evaporation could occur when high temperature particles contact with low temperature liquid. This kind of phenomenon is associated with the safety of engineering and the problems in high-transient multi-phase fluid and heat transfer. The study was concerned in the design and build-up an observable experiment facility. The first series of experiments were performed by pouring one or six high temperature particles into a low saturated temperature liquid pool. The falling-down speeds of particles were recorded by high-speed camera, so the special resistant acting on the moving high-temperature particles could be known, which was induced by the high-speed evaporation surrounding the particles. The study has experimentally verified the theory of evaporation drag model.
出处
《原子能科学技术》
EI
CAS
CSCD
2003年第5期442-446,共5页
Atomic Energy Science and Technology
基金
国家自然科学基金资助项目(50046026)
关键词
传热阻力
耦合特性
安全
蒸汽爆炸
反应堆
事故
Accident prevention
Drag
Evaporation
Heat transfer
High speed cameras
Liquids
Particles (particulate matter)
Vapors
