Local Temperature Distribution on the Spacecraft Surface under Uneven Solar Radiation

Aèrokosmičeskij Naučnyj Žurnal

V. S. Zarubin¹  G. N. Kuvyrkin¹  I. Yu. Savel'eva¹ 

[1] МГТУ им. Н.Э. Баумана;

关键词: космический аппарат;    равновесная температура поверхности;    температурное состояние оболочки;   

DOI  :  

来源: DOAJ

【 摘 要 】

Solar radiation is the main factor to determine the thermal state of a spacecraft (SC) when it moves to the sunlit portion of the Earth orbit and moves away from the Earth. The extent of the solar radiation impact on the SC temperature state depends, primarily, on the interaction of this radiation with the surface portions of the SA body and the design elements that are placed outside the main body. To ensure the required SC temperature surfaces are used various coating and screen-vacuum thermal insulation, as well as multilayer optical solar reflectors with a thickness being in the range from tenths of a millimeter to 15 − 20 mm.
When designing the SC, to predict their temperature state at various stages of operation are used mathematical models of various levels of complexity, including models related to the solution of inverse problems for determining the conditions of the thermal effects on the SC and thermal properties of structural thermal protection materials. In most famous works, which analyse the SC temperature and condition, a mathematical model is based on the heat balance equation composed for the SC discrete circuits and containing discrete temperature values of individual functional units, structural elements and parts of the surface.
This work is aimed at defining the continuous local temperature distribution over the surface of a thin-walled shell of the SC with uneven solar radiation, including cases of moving boundaries between areas with different intensity of exposure. Application of an equilibrium temperature concept of the Sun-irradiated SC surface area allowed formulating and solving the nonlinear problems on calculation of the temperature state of the shell, which is perfectly thermally isolated on the inside surface and is non-evenly irradiated on the outside surface. The paper presents the calculated dependences for finding the temperature distribution of the shell in the vicinity of jump values of the equilibrium temperature of the surface and in the zone of the shaded band. It also considers the problem of determining the shell temperature condition at the translational and vibrational movement of the boundary between the irradiated and shaded areas.

【 授权许可】

Unknown