Key Technical Study of Infrared Thermography on Aerodynamic Heating Measurement in Hypersonic Wind Tunnel

Abstract

Abstract:In the article, it was discussed how to correct surface directional emittance in a big optical incident angle and how to relate model coordinates to corresponding pixel locations of model infrared mapping and how to raise the accuracy of heat transfer rates measurement. Some simple practical methods were obtained. As the example of these methods to be applied , the transfer rates on a thin skin flat plate with a wedge and on sphere-cylinder model were measured by means of infrared thermography or thermocouple. The infrared results and thermocouple ones agreed with each other very well.