Accurate calculation of conductive conductances in complex geometries for spacecrafts thermal models
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2016-02-15
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Abstract
The thermal subsystem of spacecrafts and payloads is always designed with the help of Thermal Mathematical Models. In the case of the Thermal Lumped Parameter (TLP) method, the non-linear system of equations that is created is solved to calculate the temperature distribution and the heat power that goes between nodes. The accuracy of the results depends largely on the appropriate calculation of the conductive and radiative conductances. Several established methods for the determination of conductive conductances exist but they present some limitations for complex geometries. Two new methods are proposed in this paper to calculate accurately these conductive conductances: The Extended Far Field method and the Mid-Section method. Both are based on a finite element calculation but while the Extended Far Field method uses the calculation of node mean temperatures, the Mid-Section method is based on assuming specific temperature values. They are compared with traditionally used methods showing the advantages of these two new methods
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Publisher Copyright: Ā© 2015 COSPAR. Published by Elsevier Ltd. All rights reserved.
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Computational simulation , Conductances , FEM , Space thermal control , Thermal lumped parameter method , Space Thermal Control , Thermal Lumped Parameter Method , FEM , Computational simulation , Conductances , Aerospace Engineering , Astronomy and Astrophysics , Geophysics , Atmospheric Science , Space and Planetary Science , General Earth and Planetary Sciences , Funding Info , Ministry of Science and Technology and Ministry of Education and Culture (Spain) , Ministry of Science and Technology and Ministry of Education and Culture (Spain)
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Garmendia , I , Anglada , E , Vallejo , H & Seco , M 2016 , ' Accurate calculation of conductive conductances in complex geometries for spacecrafts thermal models ' , Advances in Space Research , vol. 57 , no. 4 , pp. 1087-1097 . https://doi.org/10.1016/j.asr.2015.12.027