High-accuracy estimation of aerodynamic heating in high enthalpy flowusing Temperature-Sensitive Paint and Inverse method

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The objective of this study is the establishment of aerodynamic heating measurement technique using Temperature-Sensitive Paint (TSP) in high enthalpy flow with self-luminescence such as an atmospheric re-entry vehicle. First of all, the effect of model material, thickness and the limitation of spatial resolution for the heat flux distribution estimation were evaluated by laser heating test. In addition, TSP characteristics were investigated for the sensitivity with the different thickness and material, the response, the degradation. Then, this technique was applied to hypersonic wind tunnel test and the accuracy was evaluated. The results demonstrated the validity of TSP technique for aerodynamic heating measurement.