Cr涂层锆包壳池式沸腾传热实验研究  

Experimental Study on Pool Boiling Heat Transfer of Cr-coated Zirconium Cladding

作　　者：曾谢虎 陈志强[1,3] 文青龙 杜强[1,2] 张瑞谦[4] 杜沛南[4] Zeng Xiehu;Chen Zhiqiang;Wen Qinglong;Du Qiang;Zhang Ruiqian;Du Peinan(Department of Nuclear Engineering and Technology,School of Energy and Power Engineering,Chongqing University,Chongqing,400044,China;Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,Ministry of Education,Chongqing University,Chongqing,400044,China;DEC Academy of Science and Technology Co.,Ltd.,Chengdu,611731,China;Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]重庆大学能源与动力工程学院核工程与技术系,重庆400044 [2]重庆大学低品位能源利用技术及系统教育部重点实验室,重庆400044 [3]东方电气集团科学技术研究院有限公司,成都611731 [4]中国核动力研究设计院,成都610213

出　　处：《核动力工程》2023年第2期91-97,共7页Nuclear Power Engineering

摘　　要：铬(Cr)涂层锆合金包壳被认为是最有前途的耐事故燃料(ATF)包壳材料之一,这种材料的表面状态对传热性能的影响程度将极大地影响着涂层锆包壳的工艺优化方向。本文在常压下的Cr涂层锆合金包壳池式沸腾实验装置中对不同工艺方法下制备的Cr涂层锆合金包壳进行实验,研究了粗糙度等表面状态对传热的影响规律及其机制。结果表明,表面粗糙度的提高能降低汽化核心产生的条件,在相同壁面过热度下可显著强化传热。在本文研究参数范围内,随着传热表面粗糙度的提高,临界热流密度(CHF)相应地呈上升趋势,增加表面粗糙度能有效提高CHF值。在此基础上,本文还建立了粗糙度对传热系数影响的预测关系式。Chromium(Cr)coated zirconium alloy cladding is considered as one of the most promising cladding materials for accident tolerant fuel(ATF).The degree of influence of the surface state of this material on the heat transfer performance will greatly affect the process optimization direction of coated zirconium cladding.In this paper,experiments are conducted on the Cr-coated zirconium alloy claddings prepared under atmospheric pressure in the pool boiling experimental device for Cr-coated zirconium alloy cladding.The influence law and mechanism of surface states such as roughness on heat transfer are studied.The results show that the improvement of surface roughness can reduce the conditions for the formation of vaporization core and significantly enhance heat transfer under the same wall superheat degree.Within the range of parameters studied in this paper,with the increase of heat transfer surface roughness,CHF shows an upward trend accordingly.Increasing the surface roughness can effectively improve the CHF value.On this basis,the prediction relational expression of the influence of roughness on heat transfer coefficient is also developed in this paper.

关 键 词：耐事故燃料(ATF) 铬(Cr)涂层锆合金包壳 粗糙度 沸腾曲线 临界热流密度 

分 类 号：TL334[核科学技术—核技术及应用]