The driving mechanism of the unsteady flow mode oscillation, arising over spiked bodies, was analyzed by using computational fluid dynamics as a tool. Laminar, axisymmetric flow at Mach 6.00 and Reynolds number (based on the blunt-body diameter) of 0.13 x 104 was simulated by a spatially and temporally second-order-accurate finite volume method. The model geometry was a forward-facing cylinder of diameter D equipped with a spike of length L/D = 2.00. Verification and validation of the numerical method are followed by a detailed analysis of the numerical results. It was found that, apart from some minor modifications, the oscillation flow mode was driven by the energetic shear-layer hypothesis of Kenworthy (Kenworthy, M., 'A Study of Unstable Axisymmetric Separation in High Speed Flows,' Ph.D. Dissertation, Dept. of Aerospace and Ocean Engineering, Virginia Polytechnic Inst. and State Univ., Blacksburg, VA, 1978), a viscous phenomenon in nature.


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    Title :

    Driving mechanisms of high-speed unsteady spiked body flows, Part 2: Oscillation mode


    Additional title:

    Instationäre Überschallströmung an Rotationskörpern mit Spike, Teil 2: Eigenschwingung


    Contributors:
    Feszty, D. (author) / Badcock, K.J. (author) / Richards, B.E. (author)

    Published in:

    AIAA Journal ; 42 , 1 ; 107-113


    Publication date :

    2004


    Size :

    7 Seiten, 10 Bilder, 11 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English