This paper presents results of a system study of transpiration cooled thermal protection systems for Earth re-entry. The cooling performance for sustained hypersonic flight and transient re-entry of a blunt cone geometry is assessed. A simplified numerical model is used to calculate the transient temperature of a transpiration cooled heat shield. The performance of transpiration cooling is assessed by calculating the overall required coolant mass for different steady state and transient flight scenarios. Spatially and temporally optimised mass injection is presented for various flight conditions. The majority of the injection is required on the spherical nose segment of the blunted cone. Carbon/Carbon composite ceramic and the ultra high temperature ceramic Zirconium diboride are considered as wall materials. Both materials require similar amounts of coolant injection. In continuous hypersonic cruise, transpiration cooling is highly effective for flight conditions with velocities below 8 km s−1 and altitudes above 40 km. For transient re-entry, transpiration cooling is most viable for trajectories of entry velocities below 8.5 km s−1 and ballistic coefficients below 2.1 kg m−2.


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    Titel :

    Performance of transpiration cooled heat shields for re-entry vehicles


    Beteiligte:
    Hermann, T (Autor:in) / McGilvray, M (Autor:in) / Naved, I (Autor:in)

    Erscheinungsdatum :

    04.11.2019



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    DDC:    621



    Performance of Transpiration-Cooled Heat Shields for Reentry Vehicles

    Hermann, Tobias / McGilvray, Matthew / Naved, Imran | AIAA | 2020


    Performance of Transpiration Cooled Heat Shields for Hypersonic Vehicles

    Hermann, Tobias A. / Naved, Imran / McGilvray, Matthew | AIAA | 2019


    Correction: Performance of Transpiration-Cooled Heat Shields for Reentry Vehicles

    Hermann, Tobias / McGilvray, Matthew / Naved, Imran | AIAA | 2020


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    Sparhawk, H. E. / Strauss, E. L. | NTRS | 1968


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    Davis, R.M. | Engineering Index Backfile | 1961