AC45 Wing Sails

msbealo · January 26, 2012, 11:17

Hi Guys,

I just wanted to share with you some pictures of a simulation I did of an America's Cup AC45 wing sail catamaran. It's a pretty simple simulation but I thought it looks pretty cool.

The tricky part is the gap between the two elements of the wing sail. This is typically set to around 3% of the main profile chord.

I'd be keen to know people thoughts and any suggestions on improvement.

Mark

vinz · January 27, 2012, 01:36

Do you have pictures of yuor mesh?

msbealo · January 30, 2012, 10:25

Quote:

Originally Posted by vinz

Do you have pictures of yuor mesh?

Vinz,

Certainly.

It's a little coarse but it's the best I could do with 5 million cells. I didn't add any surface layers as I was more interested in the flow patterns rather than the viscous drag. Surface layers would have helped in the gap between the elements but I had trouble getting them to mesh. Not shown is an additional refinement region around the boat/wings. I scaled this region down a little to try to increase the number of cells in the gap region.

The lift and drag values seemed reasonable but I've not validated the model.

Mark

lmg2e09 · October 13, 2012, 10:36

I am doing a study on the arodynamic forces acting on the AC45 wing and then I will simulate on CFD (CFX, Fluent of OPENFOAM) the various stages and angles of attack at which the sail will tack.

Have you got any calculations of you wings?
Let me know
L

ShowponyStuart · June 25, 2013, 07:40

Hey mate,

Just curious where you got the geometry from? Did you draw it up yourself?

Any change I would be able to have a look at the geometry file? I would like to have a go at simulating something like this out of interest sake (but dont really have the time or patience to try and model the geometry as well).

Im curious to learn how to simulate stuff with free surfaces too, ie. the hulls.

Cheers in advance.

Regards,

Stu

P.s. Looks mad! Good work man.

Ranjan · November 13, 2014, 00:56

Dear Mark

Your simulations seem to be great. I am trying to simulate a 3D wing at low Re but I have had little success in getting valid results. Seems like you may be able to help.

Can I request you for your Email address ?

Thanks

January 26, 2012, 11:17	AC45 Wing Sails	#1
msbealo New Member Mark Beal Join Date: Feb 2011 Posts: 24 Rep Power: 15	Hi Guys, I just wanted to share with you some pictures of a simulation I did of an America's Cup AC45 wing sail catamaran. It's a pretty simple simulation but I thought it looks pretty cool. The tricky part is the gap between the two elements of the wing sail. This is typically set to around 3% of the main profile chord. I'd be keen to know people thoughts and any suggestions on improvement. Mark __________________ Dynamic Fluid Design www.dynamic-fluid-design.com

June 25, 2013, 07:40		#5
ShowponyStuart Member Stuart Join Date: Jun 2012 Posts: 59 Rep Power: 13	Hey mate, Just curious where you got the geometry from? Did you draw it up yourself? Any change I would be able to have a look at the geometry file? I would like to have a go at simulating something like this out of interest sake (but dont really have the time or patience to try and model the geometry as well). Im curious to learn how to simulate stuff with free surfaces too, ie. the hulls. Cheers in advance. Regards, Stu P.s. Looks mad! Good work man. Last edited by ShowponyStuart; June 25, 2013 at 07:46. Reason: Forgot to say how awesome it was.

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January 27, 2012, 01:36		#2
vinz Senior Member Vincent RIVOLA Join Date: Mar 2009 Location: France Posts: 283 Rep Power: 18	Do you have pictures of yuor mesh?

October 13, 2012, 10:36		#4
lmg2e09 New Member laura marimon Join Date: Oct 2012 Posts: 2 Rep Power: 0	I am doing a study on the arodynamic forces acting on the AC45 wing and then I will simulate on CFD (CFX, Fluent of OPENFOAM) the various stages and angles of attack at which the sail will tack. Have you got any calculations of you wings? Let me know L

November 13, 2014, 00:56		#6
Ranjan New Member Ranjan Join Date: Apr 2014 Posts: 29 Rep Power: 12	Dear Mark Your simulations seem to be great. I am trying to simulate a 3D wing at low Re but I have had little success in getting valid results. Seems like you may be able to help. Can I request you for your Email address ? Thanks