Abstract Since their development at the end of the 50s, panel methods were widely used for the fast simulation of aerospace objects reentry. Although improvements were proposed for the continuum regime formulations, the bridging functions usually employed in the transitional regime did not go through major changes since then. With the current interest in designing Very Low Earth Orbit satellites and more efficient reentry vehicles, a greater level of preciseness is now required for the fast computation of the aerodynamic and aerothermodynamic wall quantities in rarefied regime. In this context, this paper presents a new approach to build Machine Learning based surrogates going from the choice of the design variables and the Design of Experiments, to the models training and evaluation. Hence, kriging and Artificial Neural Networks are respectively trained to predict the pressure and heat flux stagnation coefficients, and the pressure, friction and heat flux coefficient distributions in the rarefied portion of any aerodynamic shape’s reentry.

    Highlights New reduced models for the wall quantities in hypersonic rarefied conditions. Kriging models for the stagnation heat flux and pressure coefficients. Neural networks for the friction, heat flux and pressure coefficient distributions. A thorough and challenging validation of the models has been carried out. A more precise and generic alternative to classic panel methods.


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    Title :

    Machine Learning based reduced models for the aerothermodynamic and aerodynamic wall quantities in hypersonic rarefied conditions


    Contributors:

    Published in:

    Acta Astronautica ; 204 ; 83-106


    Publication date :

    2022-12-24


    Size :

    24 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Aerothermodynamic Characteristics in the Hypersonic Continuum-Rarefied Transitional Regime

    Glass, C. E. / Moss, J. N. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2001





    Aerodynamic Characteristics Evaluation Under Hypersonic Rarefied Flow Conditions

    Suzuki, Toshiyuki / Ozawa, Takashi / Fujita, Kazuhisa | AIAA | 2013