A TSP (Temperature-Sensitive Paint) measurement technique was applied to high enthalpy shock tunnel JAXA-HIEST in Japan. Circular cone model with the total length of 1100 mm was used as a test model. The model was equipped with thermocouples, and TSP was painted on the side of the model. Measured heat flux distributions by TSP were compared with that by thermocouples to evaluate TSP measurement in JAXA-HIEST. In this test, TSP heat flux measurement could detect the boundary layer transition, and the heat flux profiles along the centerline from the nosetip to the rear showed almost same tendency by two different measurement techniques. In addition, when in-situ calibration of TSP is employed, heat flux profiles along the model centerline obtained by TSP wan in good agreement with thermocouples quantitatively at low stagnation enthalpy condition of H_0= 4.0 MJ/kg. However, the heat flux measured by TSP with a-priori calibration was made smaller than that of thermocouples due to the self-illumination of test flow. In a test conducted at the stagnation enthalpy of 5.0 MJ/kg, self-illumination of flow become too prominent to carry out quantitative TSP measurement. To achieve accurate quantitative heat flux measurement by TSP in HIEST, development of a measurement system which can remove the illumination from the flow is required.
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