Browsing by Author "Moraris, Vassilis Michael"

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    Aerodynamic and performance characteristics of a passive leading edge Kruger flap at low Reynolds numbers
    (Royal Aeronautical Society, 2012-07-31T00:00:00Z) Moraris, Vassilis Michael; Lawson, Nicholas J.; Garry, Kevin P.
    An experimental and numerical study was performed on a Clark Y aerofoil with a 10% chord leading edge Kruger flap to examine its aerodynamic performance at Reynolds numbers of 0.6 × 106, 1 × 106, and 1.6 × 106, to help to identify the forces and moments acting on a basic configuration. A detailed comparison of the numerical and experimental data is presented in this paper. The leading edge flap was effective at high angles of attack with an increase in CL of up to 18% over a conventional no flap configuration and delayed separation by up to 3°. The moments around the Kruger flap rotation point were calculated from the numerical analysis as an initial stage in the design of a UAV passive flap system and they are also presented in the pa
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    Experimental and numerical investigation of leading edge Krueger flaps at low Reynolds numbers
    (Cranfield University, 2012) Moraris, Vassilis Michael; Lawson, Nicholas J.
    Recent publications examining the flight of Eagles have shown that leading edge feather deflections occur on the lower surface of the wings in free flight to create a leading edge flap analogous to a Krueger flap system. Such passive high lift devices may be adaptable to the lifting surfaces of unmanned air vehicles (UAVs). This work is aimed to an application of a passive leading edge Krueger device which will deploy during the landing and takeoff stages of a UAV flight. Cont/d.