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Profile Drag and Pressure Drag? 
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#1
Jun710, 09:18 AM

P: 42

Can someone please tell me the difference between profile drag and pressure drag if there is one??.



#2
Jun710, 09:32 AM

P: 4,777

Try Google, this is very basic. If you don't get stuck there, repost here and I'll help you.



#3
Jun710, 09:53 AM

P: 42

I tried but they are telling me that profile drag is skin friction and pressure drag...the thing is i read the following line in raymer
' For many aerodynamic calculations, it has been traditional to separate the airfoil into its thickness distribution and zero thickness camber line. The former provides the major influence on the profile drag, while the latter provides the major influence on lift and induced drag' The thing if pressure drag is part of profile drag and since it is due to separation, shouldnt thickness distribution also change lift, since if pressure drag changes, pressure distribution changes and hence lift changes. Someone told me that profile drag is due to frontal area only, the stagnation part. Is this true???. Thanks. 


#4
Jun710, 11:12 AM

P: 43

Profile Drag and Pressure Drag?
So then the two are used as Raymer says airfoil thickness distribution provides the data for thickness and viscous effects complimented with thin airfoil theory for lift and induced drag absent of thickness & viscous effects. 


#5
Jun710, 11:46 AM

P: 3

The airfoil is separated into thickness distribution and camber. This thickness distribution, then would be symmetrical abd wont have any effect on lift (atleast not much significant effect). 


#6
Jun710, 01:08 PM

P: 42

Thats true, but what is profile drag. Is it pressure drag, skin friction drag, or drag due to frontal area??



#7
Jun710, 01:27 PM

P: 43




#9
Jun710, 01:49 PM

P: 43




#10
Jun1310, 03:55 AM

P: 4,512




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