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Forum: Main CFD Forum

July 13, 2011, 13:26

Replies: 7

2D External flow over NACA0012

Views: 1,716

Posted By Martin Hegedus

Not sure what might be going on, so here are...

Not sure what might be going on, so here are things I try to do.

1) I would guess that CFX has an example of an airfoil. Play around with that by changing, one at a time, input values to reflect...

Forum: Main CFD Forum

July 12, 2011, 22:23

Replies: 7

2D External flow over NACA0012

Views: 1,716

Posted By Martin Hegedus

Sorry, at the moment I think there is something I...

Sorry, at the moment I think there is something I am unaware of. If your airfoil is 2D, which it sounds like it is, then it should stall somewhere around 12-15 degrees.

BTW, why do you model your...

Forum: Main CFD Forum

July 12, 2011, 21:52

Replies: 7

2D External flow over NACA0012

Views: 1,716

Posted By Martin Hegedus

OK, I'm confused. Your airfoil stalls at 30...

OK, I'm confused. Your airfoil stalls at 30 degrees? I'm assuming your flow is incompressible/low subsonic and not high supersonic/hypersonic.

If your airfoil stalls at 30 that would put lift,...

Forum: Main CFD Forum

July 12, 2011, 18:28

Replies: 7

2D External flow over NACA0012

Views: 1,716

Posted By Martin Hegedus

The 90 values will be dependent on Re to an...

The 90 values will be dependent on Re to an extent, but, yes, the ball park number for Cd at 90 degrees for a normal non fat airfoil is 2.

http://hdl.handle.net/2060/19930084501

I gather your...

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