Uncertainty Analysis of Heat Transfer Properties of Corrugated-core Sandwich Panel

Abstract

Corrugated-core sandwich panel, which can combine thermal insulation and bearing function, has been used in the design process of integrated thermal protection system (ITPS). This paper focuses on the heat transfer properties of Corrugated-core sandwich panel during the re-entry process under uncertain environment. The uncertainties come from material properties, geometric dimensions and thermal load environment. Interval variables are introduced to describe these uncertainties due to often only small sample information being obtained from experiment and measurement. Based on the non-probabilistic set theory, we use two interval analysis methods named interval analysis methods based on Taylor expansion and collocation interval analysis methods based on Chebyshev polynomial to observe the propagation of uncertainty in the heat transfer analysis. The results show that the existence of uncertainties has obvious effect for heat transfer analysis results. The safety of ITPS will be improved when consider the heat transfer analysis under uncertain environment.