初混合阶段熔融金属的热工水力特性  

Thermo-Hydraulic Characteristics of Melt Jet for Premixing

作　　者：李天舒[1] 杨燕华[1] 袁明豪[1] 胡志华[1] 

机构地区：[1]上海交通大学核科学与工程学院,上海200030

出　　处：《核动力工程》2008年第3期23-27,共5页Nuclear Power Engineering

基　　金：国家自然科学基金资助项目(50376036)

摘　　要：采用高速摄像仪拍摄记录熔融金属液柱入水碎化的过程。实验研究了熔融金属温度、入水速度、冷却水温度对熔融金属液柱下落过程的影响。实验结果表明,无量纲碎化长度与经验关系公式吻合得很好;熔融金属温度对金属下落速度没有影响;提高冷却水温度对熔融金属液柱的下降速度有一定的促进作用;大直径金属液柱的平均下降速度明显大于小直径的平均下降速度。In order to investigate the coarse mixing stage mechanism of the vapor explosion, an observable experiment equipment facility for low-temperature molten materials to be dropped into water was designed in this study. In the experiment, molten material jet was injected into water to experimentally obtain the visualized information. The effects of metal temperature, coolant temperature and jet diameter were investigated. The experimental results show that jet dimensionless length L/D agrees well with the correlation. The jet diameter and coolant temperature have effects on the falling of the jet front while metal temperature hasn＇t.

关 键 词：蒸汽爆炸 碎化 初混合阶段 可视化实验装置 

分 类 号：TU431[建筑科学—岩土工程] TH811[建筑科学—土工工程]