3D Wing

samcfd · May 17, 2012, 02:54

HI could any1 help me on how to assign pitch and yaw angles in fluent while running a simulation over a 3D wing. I want to assign both these values at the same time..

Far · May 17, 2012, 03:59

Let say fuselage is in X-Y plane and wings along the Z-direction. In this case logntitudal axis is X and vertical one is Y. The Z-axis is pointing out of X-Y plane.

Pitch angle = alpha
Yaw angle = beta

Formulae are:

Case 1: Only alpha (Beta = 0)
X = Cos (alpha)
Y = Sin (alpha)
Z = 0

Case 2 : Only Beta (Alpha = 0)
X = Cos (Beta)
Y = 0
Z = Sin (Beta)

Case 3 : Both Alpha and Beta (360 model)
X = Cos (alpha) cos (Beta)
Y = Sin (Alpha)
Z = Cos (alpha) sin (Beta)

http://en.wikipedia.org/wiki/Axis-angle_representation
http://en.wikipedia.org/wiki/Yaw,_pi...93Bryan_angles
http://en.wikipedia.org/wiki/Flight_...wing_aircraft)

samcfd · May 17, 2012, 04:13

Quote:

Originally Posted by Far

Let say fuselage is in X-Y plane and wings along the y-direction. In this case logntitudal axis is X and vertical one is Y. The Z-axis is pointing out of X-Y plane.

Pitch angle = alpha
Yaw angle = beta

Formulae are:

Case 1: Only alpha (Beta = 0)
X = Cos (alpha)
Y = Sin (alpha)
Z = 0

Case 2 : Only Beta (Alpha = 0)
X = Cos (Beta)
Y = 0
Z = Sin (Beta)

Case 3 : Both Alpha and Beta (360 model)
X = Cos (alpha) cos (Beta)
Y = Sin (Alpha)
Z = Cos (alpha) sin (Beta)

http://en.wikipedia.org/wiki/Axis-angle_representation
http://en.wikipedia.org/wiki/Yaw,_pi...93Bryan_angles
http://en.wikipedia.org/wiki/Flight_...wing_aircraft)

Thank you for the reply...it was really grateful..I wanted to ask you of where to apply these formulas.. in the boundary conditions while setting the inlet velocities or at any other place,,,

Far · May 17, 2012, 04:36

At : Inlet velocity (incompressible flow) OR pressure far field (compressible flow)

samcfd · May 17, 2012, 05:51

hi thanks..i'm finding it a bit difficult assigning the values..cold you pls let me know the formula while the wing is in the Z direction

Far · May 17, 2012, 05:58

Need to check it. But you can rotate your model in Fluent.

Far · May 17, 2012, 06:03

Quote:

formula while the wing is in the Z direction

Leading/trailing edge is parallel to Z axis? If yes, then same formulae are valid.

May 17, 2012, 02:54	3D Wing	#1
samcfd Member samrat himvanth nanduri Join Date: May 2012 Posts: 30 Rep Power: 14	HI could any1 help me on how to assign pitch and yaw angles in fluent while running a simulation over a 3D wing. I want to assign both these values at the same time..

May 17, 2012, 03:59		#2
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	Let say fuselage is in X-Y plane and wings along the Z-direction. In this case logntitudal axis is X and vertical one is Y. The Z-axis is pointing out of X-Y plane. Pitch angle = alpha Yaw angle = beta Formulae are: Case 1: Only alpha (Beta = 0) X = Cos (alpha) Y = Sin (alpha) Z = 0 Case 2 : Only Beta (Alpha = 0) X = Cos (Beta) Y = 0 Z = Sin (Beta) Case 3 : Both Alpha and Beta (360 model) X = Cos (alpha) cos (Beta) Y = Sin (Alpha) Z = Cos (alpha) sin (Beta) http://en.wikipedia.org/wiki/Axis-angle_representation http://en.wikipedia.org/wiki/Yaw,_pi...93Bryan_angles http://en.wikipedia.org/wiki/Flight_...wing_aircraft) Last edited by Far; May 17, 2012 at 06:11.

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May 17, 2012, 04:36		#4
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	At : Inlet velocity (incompressible flow) OR pressure far field (compressible flow)

May 17, 2012, 05:51		#5
samcfd Member samrat himvanth nanduri Join Date: May 2012 Posts: 30 Rep Power: 14	hi thanks..i'm finding it a bit difficult assigning the values..cold you pls let me know the formula while the wing is in the Z direction

May 17, 2012, 05:58		#6
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	Need to check it. But you can rotate your model in Fluent.