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

Aerodynamic Coefficients

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 22, 2011, 03:22
Exclamation Aerodynamic Coefficients
  #1
New Member
 
sanboju
Join Date: Jan 2011
Posts: 14
Rep Power: 6
sanboju is on a distinguished road
I want to know how to get the lift and drag values in CFView and its coefficients in a 2D airfoil. How can I operate the pressure around the airfoil?

Does exits some kind of solution to plot the entire Cl-AoA, Cd-AoA, Cd/Cl - AoA curves? Do I have to do one simulation for every point of the graph?

Thanks,
Sanboju
sanboju is offline   Reply With Quote

Old   July 24, 2011, 20:52
Default
  #2
Member
 
CJ
Join Date: Apr 2010
Location: Malaysia
Posts: 69
Rep Power: 7
oldshoes81 is on a distinguished road
Send a message via MSN to oldshoes81 Send a message via Skype™ to oldshoes81
Hi,

Both lift and drag value could be found in .mf and .wall files in your computation directory. We do not compute the coefficient and it has to be calculated manually for the moment to consider your span area.

I hope this is useful.
__________________
Regards
CJ
NUMIT Enterprise, Malaysia
+6 017 656 3436
http://maccom-numit.blogspot.com
http://www.numit.com.my
Email : seiko.q@numit.com.my
oldshoes81 is offline   Reply With Quote

Old   July 25, 2011, 08:15
Default
  #3
New Member
 
sanboju
Join Date: Jan 2011
Posts: 14
Rep Power: 6
sanboju is on a distinguished road
Quote:
Originally Posted by oldshoes81 View Post
Hi,

Both lift and drag value could be found in .mf and .wall files in your computation directory. We do not compute the coefficient and it has to be calculated manually for the moment to consider your span area.

I hope this is useful.
Hi,

Thanks a lot because of your reply. I will read the documentation to find how extract that values. I've got the *.mf file empty with this advice "NO INLET AND / OR EXIT FOUND". I've used external boundary conditions on the limits. In the *.wall file I could see some parameters per block. Does It means I have as much pressure resultant as blocks (4 in my case as you can se on the picture)?

Another question… does the lift and drag that Fine/Turbo shows in the graph correctly computed depending on flow direction meanwhile the computation is on?

Thanks,
Sanboju
Attached Images
File Type: jpg Blade.JPG (6.9 KB, 17 views)
sanboju is offline   Reply With Quote

Old   July 28, 2011, 20:07
Default
  #4
Member
 
CJ
Join Date: Apr 2010
Location: Malaysia
Posts: 69
Rep Power: 7
oldshoes81 is on a distinguished road
Send a message via MSN to oldshoes81 Send a message via Skype™ to oldshoes81
Hi,

Your question is quite blur. Are you using FINE(TM)/TURBO or FINE(TM)/HEXA?
__________________
Regards
CJ
NUMIT Enterprise, Malaysia
+6 017 656 3436
http://maccom-numit.blogspot.com
http://www.numit.com.my
Email : seiko.q@numit.com.my
oldshoes81 is offline   Reply With Quote

Old   July 29, 2011, 03:24
Default
  #5
New Member
 
sanboju
Join Date: Jan 2011
Posts: 14
Rep Power: 6
sanboju is on a distinguished road
I'm using Fine/Turbo, modeling with IGG. I refered to the convergence history values of lift and drag. In the picture I've uploaded you can see the nearest blocks around the blade, It exits another blocks defining the domain.
sanboju is offline   Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Calculate aerodynamic coefficients with openfoam using only opensource programs Xwang OpenFOAM 19 September 14, 2012 01:50
aerodynamic coefficients (viscous/inviscid flow) nicola_salin Main CFD Forum 3 May 5, 2011 17:35
2D NACA0015 aerodynamic coefficients computimg sailor FLUENT 1 May 3, 2011 12:58
Computing aerodynamic coefficients on bidimensional sections in 3D problems Aragon FLUENT 0 July 22, 2009 04:07
Launch vehicle aerodynamic coefficients B. Sulejmanovic Main CFD Forum 1 April 26, 2005 09:59


All times are GMT -4. The time now is 20:55.