摘要
非能动安全壳冷却系统是先进压水堆非能动安全系统的重要组成部分,其中空气对流换热的能力较差,对安全影响较大,因此本文主要研究了在大尺寸垂直单侧加热矩形通道内空气自下而上流动时的混合对流换热,用于模拟核电厂非能动安全壳冷却系统的换热情况。研究结果表明在较小雷诺数条件下自然对流的影响不能忽略且自然对流会占据主导作用;随着空气流量的增加,强迫对流换热的作用越来越明显。当前学者所用经验关系式都不能很好地体现出自然对流在混合对流中起的作用,因此本文还通过实验数据拟合了一个新的计算混合对流换热的关系式,该公式在一定雷诺数范围内与实验值能很好地符合。
The passive containment cooling system is an important part of the advanced pressurized water reactor passive safety system. The air convection heat transfer capacity is poor and has a great impact on safety. Therefore,this paper mainly studies the rectangular heating channel with large size and vertical one side heating. The mixed convective heat transfer of the inner air flowing from bottom to top is used to simulate the heat transfer of the passive containment cooling system of the nuclear power plant. The results show that the influence of natural convection can not be neglected under the condition of smaller Reynolds number and natural convection will dominate. With the increase of air flow,the effect of forced convection heat transfer becomes more and more obvious. The empirical relationship used by current scholars can not reflect the role of natural convection in mixed convection. Therefore,this paper also fits a new relational formula for calculating mixed convective heat transfer through experimental data. This formula fits well with the experimental values within a certain range of Reynolds numbers.
作者
王炜波
胡珀
杜卡帅
WANG Weibo;HU Po;DU Kashuai(School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《核科学与工程》
CAS
CSCD
北大核心
2019年第3期350-356,共7页
Nuclear Science and Engineering
基金
国家科技重大专项资助项目(2011ZX06002-005)
