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Date of Publication:2012-01-01

Journal:大连理工大学学报

Affiliation of Author(s):建设工程学部

Volume:52

Issue:2

Page Number:239-245

ISSN No.:1000-8608

Abstract:Based on the sensitivity analysis of discrete node group control
   equation for thermal network,a new improved solution,detached
   variables-parameters coefficient(DVPC) method,is proposed to solve
   thermal network problem in heat-transfer analysis of spacecraft.It
   emphasizes analyzing the spacecraft surface material properties′
   influence on the temperature field distribution.Monte Carlo ray tracing
   method is used to solve solar direct incidence area and network
   radiation transfer coefficient.Meanwhile,effects of spacecraft geometry
   sheltering on thermal network coefficient are discussed.Numerical
   simulation results indicate that the maximum temperature value of
   satellite main body in simulation model is larger than that of solar
   array.At the beginning stage,cooling velocity increases rapidly and gets
   to its maximum value,then descends slowly and reaches up to steady stage
   with 17 K discrepancy.For analyzing the impact of solar absorption
   coefficient,the calculating results of a=0.35 is employed as original
   value.Meanwhile,influence of increasing solar absorption coefficient is
   better than that of decreasing to true value.

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