闪蒸诱发的两相自然循环比例模化分析  

Scaling Analyses of the Flashing-Induced Two-Phase Natural Circulation

作　　者：郭雪晴 孙中宁 王建军 俞胜之 

机构地区：[1]哈尔滨工程大学核安全与仿真技术国防重点学科实验室,哈尔滨150001

出　　处：《工程热物理学报》2016年第6期1297-1303,共7页Journal of Engineering Thermophysics

摘　　要：本文提出了可用于非能动安全壳热量导出系统的大尺度开式自然循环系统的小比例模化方法,并对模型系统的运行特性与原型实验结果进行了对比。结果表明:通过本文的模化方法得到的模型系统不仅能很好地反映原型系统的流动现象,还能准确地估算原型系统的流动传热大小和流动不稳定边界;传热管内流体雷诺数对管内对流换热和两相振荡流动影响很大,模化时需保证模型系统传热管内流体的流动状态与原型相同;当根据实际需求对模型中某些结构参数加以限制时,得到的模型仍能较好地模拟原型系统的流动特性,在工程设计上具有一定的可行性。A scaling method is proposed for the big-scale open natural circulation,which can be used for the passive containment cooling system,and the operating behaviors between the model and the prototype systems are compared in this paper.The results are as follows：the model systems obtained cannot only reproduce the flow phenomenon of the prototype very well,but also calculated the flow and heat transfer capacity and the instability flow boundary accurately.The Reynolds number has a great influence on the convection heat transfer inside the tube and the two-phase oscillating flow.Thus,the flow state inside the model heat transfer tube should be kept the same with that in the prototype.When some geometrical parameters in the model should be restricted according to the practical requirements,the models obtained still can simulate the flow characteristics very well.So the scaling method proposed in this paper has some feasibility in the engineering design.

关 键 词：自然循环 闪蒸 小比例模化 

分 类 号：TL333[核科学技术—核技术及应用]