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Double wedge aerofoil section
Example 6.12 Using Ackeret’s theory obtain expressions for the lift and drag coefficients of the cambered double-wedge aerofoil shown in Fig. 6.52. Hence show that the minimum lift-drag ratio for the uncambered double-wedge aerofoil is y/2 times that for a cambered one with h = tjl. Sketch the flow patterns and pressure distributions around both aerofoils at the incidence for (LjD)max. (U of L)
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No camber
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Fig. 6.53 Flow patterns and pressure distributions around both aerofoils at incidence of [L/D]max |
