RESOLUTION OF A THREE-DIMENSIONAL UNSTEADY INVERSE PROBLEM BY SEQUENTIAL METHOD USING PARAMETER REDUCTION AND INFRARED THERMOGRAPHY MEASUREMENTS

Abstract

A three-dimensional unsteady inverse model has been developed to compute heat fluxes and surface temperature in various configurations. Temperature measurements are taken on one face of a thin plate using infrared thermography. The number of unknown parameters is reduced using a discrete cosine transform (DCT) analysis and by canceling values lower than a prescribed level. The efficiency of the method is proved through numerical simulations. A laboratory experiment also has been performed to estimate a flux imposed by a flame.