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Wings of cargo aircrafts usually consist of leading edge slat and trailing edge flap configurations to provide the high aerodynamic efficiency although at the cost of structurally complex design. The influence of flap gaps and the trailing edge flap angles were investigated on such configurations to quantify the change in the lift and drag coefficients. 1 performed the numerical analysis for determining the flow behavior over the airfoil configurations which included the leading edge slat and trailing edge flap devices.
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Presence of flap element on the aircraft wing will help achieve rolling and pitching moment stability by controlling the desired lift produced during the cruising condition. The addition of such devices along the wing span ensures the flow characteristics are modified to generate the desired lift required for landing, takeoff conditions. High lift devices affect the aircraft performance during the landing, takeoff situations. Keywords: airfoil, lift coefficient, drag coefficient, pressure, chord, slat, flap Introduction
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The maximum lift coefficient obtained including flap and slat elements is 3.62 and the drag coefficient is 0.368. The maximum lift coefficient for single slotted flap element is found to decrease for large angle of attack beyond the stall region and for slat element the increase in lift is found to be marginal at high angle of attack. The velocity and pressure contours distributions are illustrated to predict the laminar to turbulent flow characteristics on the airfoil surface. The lift and drag coefficients are evaluated for the airfoil configurations, 30P30N, for Reynolds number range of 1.6x10 5-1x10 6. The results were obtained for varying angle of attacks from -10 to 20deg to include the effects of turbulence.
#High lift airfoil code#
Simulations were performed using the computational panel code developed in MATLAB for the airfoils, 30P30N, GA (W)-1, RAF16, NLR 7301 configurations. Multi element airfoils are high lift devices and provide improved aerodynamic characteristics which are beneficial for several applications such as aircraft wings, wind turbine blades.