CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > SU2

Wing twist optimization using mesh deformation

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 29, 2015, 21:50
Default Wing twist optimization using mesh deformation
  #1
New Member
 
Andrew
Join Date: Mar 2015
Posts: 5
Rep Power: 7
asthelen is on a distinguished road
Hi everyone,

I would like to optimize the twist distribution of a rectangular wing in SU2. The cross sectional shape must remain the same.

Does anyone know how I could do this using mesh deformation? I cannot get FFD_TWIST_ANGLE to do what I want it to. FFD_ROTATION seems a little better since it does not warp the cross sectional shape, but I can't get that to work properly either. I have thought about using FFD_CONTROL_POINT too, which I know how to use. However, I thought this might warp the cross sectional shape.

What I have been trying seems to give the whole FFD box a constant twist angle. I instead want to apply a continuous distribution (in discrete sections perhaps? that part I am not sure about). If I use multiple DV_PARAM values at different ranges of z then the entire wing just twists/rotates it to the sum of the angles.

Here are the important parts of the .cfg file I have been using to deform the mesh. In this case I was just trying to understand how to control it by twisting the last 0.5m of the wing upwards by 10 degrees (about the trailing edge, (x,y)=(1,0)). How quickly it twists doesn't matter in this case since I was just trying to get a feel for how it works.



DV_PARAM = ( wing, 1.0, 0.0, 2.5, 1.0, 0.0, 3.08 )
DV_VALUE = 10.0

% FFD box definition for a wing of unit chord and wingspan of 3:
FFD_DEFINITION= (wing, -0.1, -0.08, -0.08, 1.1, -0.08, -0.08, 1.1, 0.08, -0.08, -0.1, 0.08, -0.08, -0.1, -0.08, 3.08, 1.1, -0.08, 3.08, 1.1, 0.08, 3.08, -0.1, 0.08, 3.08)

% divide the box into 10 sections along Z direction:
FFD_DEGREE= (1, 1, 10)



I don't think this related, but this is the command I use to deform it:
SU2_DEF inv_Rectangular_wing.cfg



Any tips, suggestions, explanations, links to other forum posts, etc. are greatly appreciated. Thanks!
asthelen is offline   Reply With Quote

Reply

Tags
ffd, ffd_rotation, ffd_twist_angle, optimization, twist

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ffd_control_point_2d feiyi SU2 4 September 30, 2019 12:42
[snappyHexMesh] SnappyHexMesh for internal Flow vishwa OpenFOAM Meshing & Mesh Conversion 24 June 27, 2016 08:54
[ICEM] surface mesh merging problem everest ANSYS Meshing & Geometry 44 April 14, 2016 06:41
Icemcfd 11: Loss of mesh from surface mesh option? Joe CFX 2 March 26, 2007 18:10


All times are GMT -4. The time now is 17:01.