ODS MA754合金传热界面接触热阻实验研究  

Experimental Study on Thermal Contact Resistance of Heat Transfer Interface of ODS MA754 Alloy

作　　者：杨万奎[1] 郭啸宇 曾和荣[1] 郭玉川 唐彬[1] 王冠博[1] 严睿豪 孟兆明 郭斯茂[1] YANG Wankui;GUO Xiaoyu;ZENG Herong;GUO Yuchuan;TANG Bin;WANG Guanbo;YAN Ruihao;MENG Zhaoming;GUO Simao(Institute of Nuclear Physics and Chemistry,CAEP,Mianyang,Sichuan 621900,China;Heilongjiang Provincial Key Laboratory of Nuclear Power System&Equipment,Harbin 150001,China;College of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900 [2]黑龙江省核动力装置性能与设备重点实验室,哈尔滨150001 [3]哈尔滨工程大学核科学与技术学院,哈尔滨150001

出　　处：《西安交通大学学报》2024年第2期100-108,共9页Journal of Xi'an Jiaotong University

基　　金：国家重点研发计划资助项目(2019YFB1901200)。

摘　　要：鉴于ODS MA754合金传热界面的接触热阻参数对全固态堆芯空间反应堆系统的热量导出具有重要影响,研发和设计了高温高压接触热阻实验装置,测量了不同温度(20~800℃)、压力(0~80 MPa)、气体氛围(He、CO_(2))以及试件表面粗糙度(1.6、3.2μm)下ODS MA754合金传热界面的接触热阻,并基于测试获得的宽量程数据点,建立了ODS MA754合金的接触热阻数据库。实验结果表明:随着接触面温度和压力的升高,界面接触热阻降低,且热阻降低的速率逐渐减小;相较于表面粗糙度为1.6μm的试件,粗糙度为3.2μm试件表面的界面接触热阻明显偏大,实验得到的定量关系可为工程样件的加工粗糙度要求提供依据;He气氛下的接触热阻远小于CO_(2)气氛,在0.1 MPa、100℃工况下,He气氛接触热阻约为CO_(2)气氛接触热阻的1/4。该研究结果可为空间反应堆的热工设计提供数据参考。Considering the thermal contact resistance parameters of ODS MA754 alloy have a significant impact on the heat transfer of all solid-state core space reactor systems,high-temperature and high-pressure thermal contact resistance measuring devices are developed and designed to measure the ODS MA754 alloy heat transfer interface thermal contact resistance under different temperatures(20—800℃),different pressures(0—80 MPa),different roughness(1.6 and 3.2μm)and in different gas environments(He and CO_(2)).The thermal contact resistance database of ODS MA754 alloy is established accordingly.The experimental results show that the interface thermal contact resistance decreases with the increase of contact temperature and pressure,and the rate of thermal resistance reduction decreases gradually.The interface contact thermal resistance of the test piece with the roughness of 3.2μm is apparently greater than that of roughness 1.6μm.The obtained quantitative relationship can provide reference for the machining roughness requirements of subsequent engineering samples.The thermal contact resistance in Helium environment is far less than that in CO_(2) environment.Under 0.1 MPa and 100℃working conditions,the thermal contact resistance in Helium environment is about one fourth of that in CO_(2) environment.The study results can provide data reference for the thermal design of space reactor.

关 键 词：空间反应堆 ODS MA754合金 接触热阻 高温高压 表面粗糙度 

分 类 号：TK121[动力工程及工程热物理—工程热物理]