Sensitivity analysis and characterization of the uncertain input data for the EXPERT vehicle

Julie Tryoen (1) , Pietro Marco Congedo (1) , Remi Abgrall (1) , Thierry E. Magin (2) , Nadège Villedieu (3)

1 BACCHUS - Parallel tools for Numerical Algorithms and Resolution of essentially Hyperbolic problems
2 Aeronautics and Aerospace Department [Rhode-St-Genèse]
3 VKI - von Karman Institute for Fluid Dynamics

The paper investigates a new methodology to rebuild freestream conditions for the trajectory of a re-entry vehicle from measurements of stagnation-point pressure and heat flux. Uncertainties due to measurements and model parameters are taken into account and a Bayesian setting 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.

Domaines: Dynamique des Fluides [physics.flu-dyn]

Julie Tryoen, Pietro Marco Congedo, Remi Abgrall, Thierry E. Magin, Nadège Villedieu. Sensitivity analysis and characterization of the uncertain input data for the EXPERT vehicle. [Research Report] RR-8360, INRIA. 2013. ⟨hal-00859809⟩