The objective of the present work is to assess the influence of thermochemical nonequilibrium or near-wake flows, whose characterization and understanding are crucial for the design of reentry vehicles. An analysis of thermal and chemical nonequilibrium effects in near-wake ionizing flows is presented. The influence of real-gas effects on the establishment of scaling laws of the near-wake properties is analyzed, and a simplified model, which relies on an idealized flow solver still capable of accounting for dissociation and ionization effects, is developed. A study of the flows around sphere-cone and Apollo-like re-entry capsule bodies shows that the forebody nonequilibrium does affect the quantities that characterize the near-wake behavior (e.g., upstream influence, extent of recirculation, peak heating along the base). In addition, we show that real-gas effects can be recovered by means of an idealized-gas model that solves for the compressible Navier-Stokes equations and a transport equation for the specific-heat ratio gamma, supplemented with algebraic relations to determine the species mass fractions and vibrational temperature as a function of gamma.


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    Titel :

    Nonequilibrium effects in near-wake ionizing flows


    Weitere Titelangaben:

    Nichtgleichgewichtseffekte in der ionisierenden Nachlaufströmung von Raumfahrzeugen beim Eintauchen in die Erdathmosphäre


    Beteiligte:
    Grasso, F. (Autor:in) / Pirozzoli, S. (Autor:in)

    Erschienen in:

    AIAA Journal ; 35 , 7 ; 1151-1163


    Erscheinungsdatum :

    1997


    Format / Umfang :

    13 Seiten, 13 Bilder, 2 Tabellen, 21 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Nonequilibrium Effects in Near-Wake Ionizing Flows

    Grasso, F. | Online Contents | 1997


    Nonequilibrium Effects in Near-Wake Ionizing Flows

    F. Grasso / S. Pirozzoli | AIAA | 1997


    Modeling of ionizing hypersonic flows in nonequilibrium

    Grasso, F. / Capano, G. | AIAA | 1995



    Shock Standoff on Hypersonic Blunt Bodies in Multi-Temperature Ionizing Nonequilibrium Gas Flows

    Higgins, Charlotte / Inger, George / Morgan, Richard | AIAA | 2002