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Bayesian-based method with metamodels for rebuilding freestream conditions in atmospheric entry flows

par Tryoen, Julie;Congedo, Pietro Marco;Abgrall, Rémi;Villedieu, Nadège A.C. ;Magin, Thierry
Référence AIAA journal, 52, 10, page (2190-2197)
Publication Publié, 2014

Article révisé par les pairs

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Résumé :

The paper investigates a new methodology to rebuild freestream conditions for the trajectory of a reentry vehicle from stagnation-point measurements. Uncertainties due to measurements and model parameters are taken into account, and a Bayesian setting supplied with metamodels is used to solve the associated stochastic inverse problem.A sensitivity analysis based on a stochastic spectral framework is first investigated to study the impact of uncertain input data on stagnation-point measurements. An original backward uncertainty propagation method is then proposed, for which only the uncertainties that have the most impact are retained.