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Physical explanation of pressure coefficent

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Old   January 21, 2008, 06:15
Default Physical explanation of pressure coefficent
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can someone give a physical explanation for pressure coefficient? I know its defn -

The pressure coefficient is a dimensionless number less than one which describes the relative pressures throughout a flow field in fluid dynamics

But what can it help explain if I have a pressure coefficient plot of an airfoil? How can I relate to its lift and drag or other info? Or if I've 2 different plots, what useful info can I obtain?

Thank you.
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Old   January 21, 2008, 10:42
Default Re: Physical explanation of pressure coefficent
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Pressure coefficient is pressure component of dimensionless local drag (or lift) force.... Integration of pressure coeff over the surface of bluff body will yield the pressure drag (or lift) coefficient.
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