高温及超高温热管的启动特性和传热极限  

Startup Characteristics and Heat Transfer Limits of High and Super High Temperature Heat Pipes

作　　者：曲伟[1] 王焕光[1] 段彦军[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100190

出　　处：《工程热物理学报》2011年第8期1345-1348,共4页Journal of Engineering Thermophysics

基　　金：国家863资助项目(No.2007AA05Z257)

摘　　要：根据局部高温、高热流加热等特殊场合的需求,设计、加工了钠高温热管及锂超高温热管,并对热管的启动和极限特性进行了研究。高温及超高温热管能够顺利启动,但启动时应注意可能到来的声速传热极限。端部加热启动时,端部附近管体部分会形成一段"等效"的加热段,可以将工质从启动时的固体状态到全部熔化形成相变传热及流动循环的时间确定为启动时间。热管的传热极限特性表明,超高温热管应工作在更高的温度和更大的热流密度。热管的结构和工艺优化有利于启动和运行。The sodium high temperature heat pipe and lithium super high temperature heat pipe were designed and made on a certain demand. The startup and heat transfer limits of the heat pipes were studied. The heat pipes could be started up successfully, in the mean time the possible sonic limit should be paid attention. For the startup of local end heating, an equivalent length near the end would be formed, and the startup time would depend on the working fluid change of fully melting and circulating. The analyzed heat transfer limits of the heat pipes showed that the super high temperature lithium heat pipe should operate at a higher temperature and higher heat flux compared with that of the sodium heat pipe. The structure and technology optimizations could improve the heat pipe startup and operation.

关 键 词：高温热管 超高温热管 端部加热 启动时间 传热极限 

分 类 号：TK124[动力工程及工程热物理—工程热物理]