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Master of science Thesis Download Page

  • Hong-Te, Hsu (2002)
    Modelling a jet in ground effect with vertical surfaces, with
    particular emphasis on shipborne operations

    M.Sc. Thesis, Department of Aerospace Engineering,
    University of Southampton, UK 

        Click here to download the PDF format of thesis

  • Abstract

    The numerical simulation of predicting the full three dimensional mean flow
    field around a V/STOL aircraft whilst operating in the presence of carrier ship
    structure and side winds has been carried out by using unstructured grids in a
    parallel computation solver, based on Flux-Corrected Transport algorithm.
    The V/STOL aircraft is modelled by dual impinging jets from nozzles. The
    computational method uses a three-dimensional finite-volume calculation.
    The procedure of quadratic upstream difference weighted difference scheme
    was used to calculate the convection terms and the standard k- e turbulence 
    model was used to calculate the distribution of the Reynolds Stress. The 
    IRIDIS, the Beowulf clusters of Southampton University, were used to 
    implement parallel computation.

    Detailed pressure distribution results of the simulation are presented for dual
    jets with velocity ratio ranging from 7.77 to 14.58 at a height of 6.67 nozzle
    diameters at three different side winds. The jet model and the ship model are
    combined to yield one flow solution, which, due to the severe non-linearities of
    the problem, cannot be achieved by superposition. The calculation reveals the
    existence of large regions of low pressure, associated with upstream
    recirculating flow region, due to the interaction between upstream wall jet and
    the cross flow, and the airwakes, due to the yaw angle-depend largely
    separated flow behind sharp edges of ship.

  • Key Words: Impinging Jet, Ground Effect, CFD, Ship Airwake, Ground Vortex,
                        JSF Fighter