SA508钢表面临界热流密度强化试验研究  

Experimental Study on Enhancement of Pool Boiling Critical Heat Flux on SA508 Carbon Steel with Cold Spray Coating

作　　者：秦菲 刘汉周[1] 胡练 陈德奇[1] 钟达文 Qin Fei;Liu Hanzhou;Hu Lian;Chen Deqi;Zhong Dawen(Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,Chongqing University,Chongqing,400044,China;Beijing Key Laboratory of Passive Nuclear Safety Technology,North China Electric Power University,Beijing,102206,China)

机构地区：[1]重庆大学低品位能源利用技术及系统重点实验室,重庆400044 [2]华北电力大学北京市非能动核能安全技术实验室,北京102206

出　　处：《核动力工程》2020年第5期30-34,共5页Nuclear Power Engineering

基　　金：中国博士后科学基金(2018M643417)。

摘　　要：利用“冷喷涂”多孔涂层制备技术,在反应堆压力容器真实材料SA508Gr3碳钢试验件表面制备了微米尺度多孔涂层。通过可旋转实验装置,在常压下开展了下朝向不同角度条件下池沸腾SA508钢试验件光表面、冷喷涂涂层表面的临界热流密度(CHF)试验研究,获得了2种表面在不同倾角下的沸腾冷却曲线。试验结果表明,随着倾角的增加,CHF增加;采用涂层表面的CHF始终高于光表面的CHF,CHF强化至少在25%以上;在多次加热和冷却循环后,多孔涂层表面保持足够的强度和稳定性。In this study,a coating technique known as“cold spray”was developed to form a micro-porous coating on the SA508 Gr3 carbon steel heater,which was the prototypical material for the reactor vessel.On the rotatable experimental bench,downward facing pool boiling CHF experiments using a plate test section under atmospheric pressure was performed to investigate the quenching curves on the CHF limits with and without cold-spray coatings at different inclination angles.Quantitative measurements showed that the local CHF values for the coated surface were consistently higher than the corresponding CHF values for the bare surface,and that the use of cold-spray coatings could enhance the local CHF limits for downward facing boiling by more than 25%.In addition,the micro-porous coatings were stable enough after many cycles of heating and cooling.

关 键 词：冷喷涂 多孔涂层 CHF强化 SA508钢 

分 类 号：TL331[核科学技术—核技术及应用]