高温颗粒下落时水面沸腾的瞬变阻力特性模型和实验验证  

Transient Evaporation Drag Model and Experiment Validation of High Temperature Sphere Penetrating Water Surface

作　　者：杨燕华[1] 李小燕[1] 

机构地区：[1]上海交通大学机械与动力工程学院,20003

出　　处：《核动力工程》2003年第5期426-429,共4页Nuclear Power Engineering

基　　金：国家自然科学基金资助项目(No.50046026)

摘　　要：建造了高温炉下落小球实验装置,并进行了高温小球落入水中的实验。考虑粒子受力的分布及蒸发对粒子周围力的影响,从阻力的基本机理上分析了蒸发状态下颗粒的运动阻力,给出了蒸发曳力的理论分析模型。该模型已用于分析核电站严重事故时发生高温融熔金属同水相互作用的蒸汽爆炸现象的事故分析程序中。结果与实验极其相符。A test facility has been constructed for the fall-down test of high-temperature sphere into the water. From analysis of the force distribution around a high-temperature sphere locating on the water surface, it is found that the effect of evaporation surround is dominated. The pressure increasing due to the high-speed evaporation results that the normal flow resistant formulation cannot be applied appropriately. A model for evaporation resistance is then suggested. A test facility was set up for the purpose to verify the theory. The experimental results showed a good consistent with the theory results. This model has been applied into an analysis code for vapor evaporation occurring under the severe accident in nuclear power plant (NPP).

关 键 词：高温颗粒 下落 沸腾运动 瞬变阻力特性 蒸汽爆炸 

分 类 号：TL364.4[核科学技术—核技术及应用]