固-液相變裝置傳熱性能數(shù)值計(jì)算研究

Numerical study on heat transfer characteristics of solid-liquid phase change material container

摘要: 衛(wèi)星內(nèi)安裝的某些設(shè)備在軌長期工作時(shí)要求維持較恒定的溫度，特別是熱容較小的設(shè)備受外熱流影響溫度波動會比較大，文章在傳統(tǒng)熱控設(shè)計(jì)的基礎(chǔ)上增加了相變裝置，利用焓法建立了設(shè)備、蜂窩板、相變裝置統(tǒng)一的控制方程，研究了空間環(huán)境下相變裝置的熱性能。結(jié)果表明：采用相變裝置有助于提高散熱面的等溫性，同時(shí)能夠有效降低設(shè)備的溫度波動范圍，為航天器內(nèi)設(shè)備的熱控設(shè)計(jì)提供了一定依據(jù)。

Abstract: A constant temperature working environment is required for the equipments mounted in the satellite on orbit. The external heat flux will affect greatly the temperature of the equipments with small heat capacity. The phase change material (PCM) container is used in the thermal control design based on traditional methods. The governing equations for equipments, honeycomb panel and PCM container are derived by using enthalpy method and the heat transfer characteristics of PCM container in space are studied. The results show that the isothermal properties are improved and the temperature fluctuation is reduced by using PCM container. This research could provide a basis for the thermal control design of equipments mounted in spacecraft.