This paper presents two-dimensional heat transfer results for the first time in an expansion tube, using infrared thermography at a Mars entry condition. Experiments were performed in the X2 expansion tube at The University of Queensland in a Martian ( CO 2 / N 2 ) test gas on a wedge model. Infrared filtering from 3.5 to 4    μ m was performed in data acquisition to remove significant radiation from the shock layer. Thermal images of a preheated surface from the infrared camera were used together with measurements from a fast response infrared sensor to obtain heat flux maps at a hypervelocity condition with flight duplicated enthalpy. Experimental heat flux results have an uncertainty of less than 10% and agreed with laminar convective theoretical correlations to within 16%, making thermography suitable for heat transfer measurements in expansion tubes. This technique has potential for future applications in studying wall/near-wall viscous phenomena dependent on surface temperatures in expansion tubes.


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    Title :

    Heat Transfer Measurements in an Expansion Tube Using Infrared Thermography


    Contributors:

    Published in:

    AIAA Journal ; 60 , 2 ; 883-891


    Publication date :

    2022-02-01




    Type of media :

    Conference paper , Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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