flow around an airfoil
DESCRIPTION
machine hydraulicTRANSCRIPT
-
Cord
Middle line
http://www.pagendarm.de/trapp/programming/java/profiles/NACA4.html
a
Angle of attack
Velocity
-
c
Lift
FL
Drag
FD
-
Pressure distribution around an airfoil
http://www.desktopaero.com/appliedaero/
0
-
+
DH
Pressure along the upper surface
Pressure along the lower surface
-
Lift
Lift
FL
-
Lift coefficient
CLFL
-
Drag
Drag
FD
-
Drag coefficient
CDFD
-
Blade profile data
Angle of attack
Average relative
velocity
d
v
Angle of attack
-
Peripheral velocity =
U
w
U
C
Wind velocity = C
Relative velocity = V
V
-
U
V
C
FL
FD
Torque
Trust
-
U
V
C
Torque
Trust
U
V
C
Torque
Trust
-
Torque
Trust
Fthrust
Mthrust
C
Fthrust
Mtorque
w
R
U
w
=
Depth
h
Cordelengt
C
2
c
F
L
2
L
r
=
Depth
h
Cordelengt
C
2
c
F
L
2
L
r
=
Depth
h
Cordelengt
C
2
c
F
D
2
D
r
=
Depth
h
Cordelengt
C
2
c
F
D
2
D
r
=
L
D
C
C