100 Data scatter Percentage of pressure drag (a) 0.2 0.4 0.6 0.8 1.0 Circular cylinder 0.3 Cp based on frontal area (tb) 0.2 Cp based on planform area (cb) Cp 0.1 - Width b Flat plate (b) 0.2 0.4 0.6 0.8 1.0 Thickness ratio Friction drag percent

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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The drag of an airfoil (Fig.) increases considerably if
you turn the sharp edge around 180° to face the stream. Can
you explain this?

100
Data scatter
Percentage of
pressure
drag
(a)
0.2
0.4
0.6
0.8
1.0
Circular cylinder
0.3
Cp based on frontal area (tb)
0.2
Cp based on planform area (cb)
Cp
0.1 -
Width b
Flat
plate
(b)
0.2
0.4
0.6
0.8
1.0
Thickness ratio
Friction drag percent
Transcribed Image Text:100 Data scatter Percentage of pressure drag (a) 0.2 0.4 0.6 0.8 1.0 Circular cylinder 0.3 Cp based on frontal area (tb) 0.2 Cp based on planform area (cb) Cp 0.1 - Width b Flat plate (b) 0.2 0.4 0.6 0.8 1.0 Thickness ratio Friction drag percent
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