CAJ | 학술논문

热管理系统是保障空间站正常运行的关键系统,其热量收集通常涉及多种传热方式.空间站舱内气压下降将削弱空气的对流换热能力,从而造成热收集方式的气压适应性差异.分析了这种差异及其对空间站热管理的影响.设计了两种针对密封舱的热量收集方式,第一种单纯用空气强制对流,第二种通过在密封舱内加装冷板,同时采用强制对流、导热和辐射进行热量收集.首先利用简化的密封舱换热模型给出了描述两种热量收集方式气压适应性的分析解,然后利用集成全局热数学模型分析给出了热管理系统采用这两种热量收集方式时压力下降对空间站温度控制的影响.结果表明,当热管理系统以空气对流为主进行热量收集时,气压下降可能导致舱内温度大幅升高;当同时采用导热、辐射及对流等多种途径收集热量时,热管理系统的气压适应性较强,有利于空间站的稳定运行.
열관리계통시보장공간참정상운행적관건계통,기열량수집통상섭급다충전열방식.공간참창내기압하강장삭약공기적대류환열능력,종이조성열수집방식적기압괄응성차이.분석료저충차이급기대공간참열관리적영향.설계료량충침대밀봉창적열량수집방식,제일충단순용공기강제대류,제이충통과재밀봉창내가장랭판,동시채용강제대류、도열화복사진행열량수집.수선이용간화적밀봉창환열모형급출료묘술량충열량수집방식기압괄응성적분석해,연후이용집성전국열수학모형분석급출료열관리계통채용저량충열량수집방식시압력하강대공간참온도공제적영향.결과표명,당열관리계통이공기대류위주진행열량수집시,기압하강가능도치창내온도대폭승고;당동시채용도열、복사급대류등다충도경수집열량시,열관리계통적기압괄응성교강,유리우공간참적은정운행.
The thermal collection of thermal management system is important to the normal space station operation, which involves multimode heat transfer. The reduction of atmospheric pressure inside the space station weakens the air forced-convection, and this will result in different atmospheric pressure adaptabilities of the thermal collecting methods. This paper studied these adaptable differences and their influences on the temperature control of the space station. Two thermal collecting methods were designed, and one involved the air forced-convention only, another involved the forced-convection, radiation and conduction by adding a cold plate in the pressure cabin. Firstly, the analytical solutions were provided to describe the atmospheric pressure adaptabilities of these two thermal collecting methods with simplified pressure cabin models. Subsequently, the influences of the atmospheric pressure on the temperature control of space station were analyzed with the integrated overall mathematical model. The results indicate: when the air forced-convection is the only mode to collect heat, the atmospheric pressure reduction may lead to a substantial increase in cabin temperature, but if the radiation, conduction and the forced-convection are adopted to collect heat synchronously, the thermal management system will have an excellent atmospheric pressure adaptability, this will benefit the steady operation of the space station.