在轨发动机羽流污染导致太阳帆板电功率损失计算模型

Loss model of solar array power caused by rocket motor plume flow contamination

双组元发动机未完全燃烧产物 MMH-HNO3是羽流污染的关键成分 ,另外一些大分子羽流污染物也是造成污染的主要成分。污染层的存在改变了电池板表面光学特性 ,导致硅电板的阳光透射率降低和热辐射吸收率增强 ,而后者使得电池板温度升高。分别计算了电池板太阳光透射率和其工作温度变化引起输出功率的损失 ,建立了羽流污染导致太阳帆板电功率损失的计算模型。

The imperfect combustion production of the bipropellant engine, monomethylhydrazinium nirate(MMH-HNO 3), is the key contaminant of the plume contamination, together with some other big molecule plume exhaust components. The optical characters of the solar cell surface can be changed as a contaminant film formed on it. The transmittance to the solar radiation can be attenuated and the absorptance to the unuseful thermal radiation can be enhanced, and the latter will make the solar cell′s temperature increased. The power loss caused by the variation of the solar radiation transmittance and the solar cell′s temperature was calculated independently, and the total cell power loss computation model including the two factors was developed.