Abstract Aeospike based wave drag reduction is investigated using two-equation turbulence model applied to Faver averaged Navier Stokes solver. Three different blunt bodies are considered in a low supersonic stream of Mach number 2. The considered blunt bodies differ in their degree of bluntness defined in terms of half cone angle, area of flattened front side and radius of bluntness. The zero angle of attack flowfield around these three bodies are computationally analyzed with and without the presence of aft spikes to evaluate the wave drag resulting from the formation of front shock structure. The influence of spike configuration on the wave drag is also investigated. The various considered spike tip geometries include aero-disk, sharp and blunt with the length of all the spikes being equal to the base diameter of the blunt bodies (L/D = 1). It has been found that the 3221 blunt body when coupled with a blunt tipped spike yielded the lowest drag coefficient of 0.3, despite the 3221 having the highest standalone drag coefficient of 0.86, among the blunt bodies when simulated individually without spikes. The physics behind the wave drag reduction associated with each combination of blunt body and spike configuration is presented with clarity. This study portrays the importance of taking bluntness factor, semi-cone angle, fineness ratio and blunt body shape factor into consideration while proposing the generalized optimum spike configuration for minimum drag attainment.

    Highlights Detailed study of aerospike based drag reduction on blunt bodies of different geometric features. Focuses on the drag reduction of realistic blunt bodies used in the space vehicles. Comparison of experimental and numerical predictions. Reveals the importance of having maximum number blunt body parameters in the scaling of optimum spike. Physics behind spike based drag reduction is presented with clarity.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Reduction of wave drag on parameterized blunt bodies using spikes with varied tip geometries


    Beteiligte:

    Erschienen in:

    Acta Astronautica ; 160 ; 25-35


    Erscheinungsdatum :

    2019-04-08


    Format / Umfang :

    11 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Drag on blunt bodies with and without spikes in low-density hypersonic flow

    BOYLAN, D. E. / HAHN, J. S. / SIMS, W. H. | AIAA | 1965


    NUMERICAL ANALYSIS OF DRAG ON BLUNT BODIES WITH THE USE OF DIFFERENT CONICAL SPIKES AT SUPERSONIC SPEED

    Parag P. Mangave / Vivek P. Warade / A. P. Shah | BASE | 2021

    Freier Zugriff

    Wave Drag Reduction of Blunt Bodies Using Laser Sustained Energy Deposition In Argon Atmosphere

    Sperber, David / Schmid, Fabian / Eckel, Hans-albert et al. | AIAA | 2012



    Blunt-Body Wave Drag Reduction Using Focused Energy Deposition

    David Riggins / H. F. Nelson / Eric Johnson | AIAA | 1999