并联直流蒸发管内两相流密度波不稳定性研究  

Investigation on Two-Phase Flow Density Wave Instability in Parallel Once-Through Evaporation Tubes

作　　者：付文[1] 李晓伟[1] 吴莘馨[1] 张征明[1] 

机构地区：[1]清华大学核能与新能源技术研究院先进反应堆工程与安全教育部重点实验室,北京100084

出　　处：《工程热物理学报》2014年第3期576-580,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目资助(No.51006061);国家科技重大专项资助项目(No.2008ZX06901)

摘　　要：首先用Khabenskii方法预测了并联蒸发管内的两相流动不稳定边界,发现当出口为过热蒸汽时Khabenskii方法预测值与实验值有较大偏差,最高达80%。然后采用RELAP5/MOD3.4程序模拟垂直并联蒸发管道的流动工况,得到的流量脉动特性与实验值能较好地吻合,同时其预报的两相流不稳定边界也与实验结果很好吻合,误差在25%以内.最后用RELAP5/MOD3.4程序分析了质量流速、入口阻力、出口阻力、入口过冷度、入口压力等因素对并联直流蒸发管内两相流动不稳定性的影响。Two-phase flow instability boundary of two parallel evaporation tubes was predicted. When the outlet of the tube is superheated steam, obvious deviation exists between the prediction results using Khabenskii method and experimental results, the maximum deviation can reach 80%. The flow and heat transfer characteristic was also simulated using RELAP5/MOD3.4 code. The density wave oscillatory behavior and instability boundary predicted using RELAP5/MOD3.4 code agree well with experiment results, the maximum deviation was 25%. Based on these results, main operating parameters such as mass flow rate, inlet resistance factor, outlet resistance factor, inlet subcooling and inlet pressure were analyzed to study their influences on two-phase flow instability of vertical parallel evaporation tubes.

关 键 词：两相流不稳定性 高温气冷堆 蒸汽发生器 

分 类 号：TK124[动力工程及工程热物理—工程热物理]