Abstract The modification of high-speed flight vehicles by adding a spike attached to the stagnation point yields a complex flow-field full of interesting details. The purpose of this work is to contribute to the following two aspects. First, to analyze the interaction between oblique shock, separation shock and reattachment shock to explain the mechanism of drag reduction caused by the spike. Second, to assess the impact of varying the spike length (L/D = 0.5, 1.0 and 1.5), angle-of-attack (up to 10°) and Mach number (up to 3) on the level of drag reduction. The results reveal that, by comparing with the un-spiked blunt nose, the maximum drag reduction is 42% for L/D = 1.0 at α = 0°. For higher angles-of-attack, the spike is found to have little benefits in reducing the drag. Moreover, the efficiency of the spike in reducing drag and increasing lift depends largely on spike length. However, the spike length does not influence the aerodynamic coefficients when it exceeds the value of the blunt-body diameter ratio (L/D = 1.0).

    Highlights Effect of spike lengths, Mach numbers and AoA on drag and flow of a spiked blunt body. The maximum drag reduction at α = 0° is about 60%. Drag decreases with spike length but when length exceeds a value the changes in drag is little. No attachment at non-zero AoA the separated shear layer so a disappearance of reattachment shock.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Evaluation of aerospike for drag reduction on a blunt nose using experimental and numerical modeling


    Beteiligte:

    Erschienen in:

    Acta Astronautica ; 160 ; 656-671


    Erscheinungsdatum :

    2019-03-02


    Format / Umfang :

    16 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Thermal and structural response of aerospike mounted on blunt-nose body

    ZhunHyok, Zhang / CholJin, Won / CholUk, Ri et al. | SAGE Publications | 2021


    Aerospike for Drag Reduction in Hypersonic Flow

    Kalimuthu, Raman / Rathakrishnan, Ethirajan | AIAA | 2008



    Breathing blunt-nose concept for drag reduction in supersonic flow

    Vashishtha, A. / Rathakrishnan, E. | Tema Archiv | 2009


    Breathing blunt-nose concept for drag reduction in supersonic flow

    Vashishtha, A / Rathakrishnan, E | SAGE Publications | 2009