Real-Time Evaluation of Severe Heat Load Over Moving Interface of Decomposing Composites

Decomposing composites undergo both surface removal and in-depth decomposition, when they are subjected to severe heating environments. As a result, the gas phase and the chemical species are injected into the boundary layer, resulting in a reduction of the heat flux entering into the solid structure. Under such conditions that geometry changes, the reconstruction of heat flux at the ablating front is quite complicated. Utilizing a procedure based on the sequential function specification method, an inverse problem is solved to anticipate the front-surface heating condition. Temperature measurements as well as measurement of the position of the ablating surface accompanied with additive noises are used for the implementation of the current procedure. Taking into account a complex set of phenomena, a numerical experiment is employed to examine the accuracy and appropriateness of the proposed technique for such problems. The results obtained demonstrate the usefulness and efficiency of the proposed method for the estimation of heat flux at the moving boundary of decomposing materials.