Effective Emissivity Determination of Multilayer Insulation for Practical Spacecraft Application

Paper #:
  • 972354

Published:
  • 1997-07-01
Citation:
Wiedemann, C., Biering, B., and Lura, F., "Effective Emissivity Determination of Multilayer Insulation for Practical Spacecraft Application," SAE Technical Paper 972354, 1997, https://doi.org/10.4271/972354.
Pages:
10
Abstract:
Multilayer Insulation (MLI) is used for thermal control of spacecraft (S/C). Built-in discontinuities degrade the performance of MLI blankets. In this paper the blanket properties are considered by defining an effective emissivity for the MLI covered S/C surface. The influence of covered area and the influence of number of layers on the effective emissivity is determined by experiments with simple MLI covered test bodies in a space simulation chamber. An equation for the calculation of the effective emissivity of Soviet EVTI-type MLI is presented. The tests are combined with investigations of thermal similarity.
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