Shock-wave–boundary-layer interaction is one of the most important phenomena in hypersonic flights due to its ubiquitous presence and its extreme effects on the aerothermodynamic loads on the aircraft surfaces. Low-frequency oscillations in separated flows in addition to high localized pressure and heat transfer as a result of such interactions make the ability to predict the flow with shock-wave–boundary-layer interaction highly essential in design of any hypersonic aircraft. To further investigate three-dimensional shock-wave–hypersonic-boundary-layer interaction, a cylindrically blunt fin–plate junction with three different sweep angles, 0, 22.5, and 45 deg, of the fin relative to the plate is chosen to numerically simulate. An MPI code written by the authors was used to solve the unsteady Navier–Stokes and ideal gas equations. The blunt fin shock wave with strength depending on the sweep angle of the fin interacts with the boundary layer on the plate and creates a separated region with a complex flow structure. The extent of the separated region decreases with increase in the sweep angle of the fin and decrease in the strength of the blunt fin shock wave. Localized high pressure forms at the reattachment point of the boundary layer by formation of a reattachment shock wave, with its maximum peak decreasing by increase in the sweep angle of the fin. The boundary-layer thickness on the blunt fin reaches its minimum at the reattachment point, where the heat transfer rate reaches its maximum value. Unsteady oscillations are observed in the 0 deg sweep angle configuration. The unsteady oscillations significantly subside with increase in the sweep angle of the fin. Time-averaged normalized heat transfer of the numerical simulations shows good agreement with the experimental data, except for the peak heat transfer for the 0 deg sweep angle case.


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    Title :

    Simulation of Hypersonic-Shock-Wave–Laminar-Boundary-Layer Interaction over Blunt Fin


    Contributors:

    Published in:

    AIAA Journal ; 57 , 8 ; 3506-3523


    Publication date :

    2019-06-19


    Size :

    18 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English