Lecture.8 - AE 1350 Lecture Notes #8 We have looked at....

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AE 1350 Lecture Notes #8
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We have looked at. . Airfoil Nomenclature Lift and Drag forces Lift, Drag and Pressure Coefficients The Three Sources of Drag: skin friction drag in laminar and turbulent flow form drag wave drag
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Airfoil Drag Polar C d vs. C l Rough airfoils have turbulent flow over them, high drag. Smooth airfoils have laminar flow over at least a portion of the surface. Low Drag.
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Form Drag Source: http://www.allstar.fiu.edu/aerojava/flight46.htm Form drag may be reduced by proper design, and streamlining the shape.
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Supersonic wave Drag For a given airfoil or wing or aircraft, as the Mach number is increased, the drag begins to increase above a freestream Mach number of 0.8 or so due to shock waves that form around the configuration.
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Shock waves
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minimized? Use wing sweep. Use supercritical airfoils, which keep the flow velocity over the airfoil and the local Mach number from exceeding Mach 1.1 or so. Use area rule- the practice of making the
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This note was uploaded on 08/17/2011 for the course AE 1350 taught by Professor Johnson during the Spring '07 term at Georgia Institute of Technology.

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Lecture.8 - AE 1350 Lecture Notes #8 We have looked at....

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