help needed for swept back wing simulation

shaker · November 22, 2011, 03:52

Hi all,

Can anyone tell me how to simulate a swept back wing in 2d process? I found the geometry of swept back airfoil using matlab code,but found absurd result after simulation. The experimental data of naca shows the stall at 34 degree but i got the stall before 20 degree for the airfoil. Is it possible in this way?

truffaldino · November 22, 2011, 05:47

For incompressible (low speed subsonic) flow you can use XFLR5 (this software applies vortex lattice method in combination with drag polars from 2d sections).

shaker · November 28, 2011, 04:04

thanks. is it possible in fluent using 2d airfoil?

sail · November 28, 2011, 15:38

i'm sorry but i might have missed something. what exactly do you mean 2d swept back wing?

as for your last post, yes in fluent it is possible to simulate a 2d profile, but remember that the stall is extreamely hard to catch.

EDIT: ok maybe i got it: you are talking about a profile deformed by the progection on the plane perpendicolar to the sweep.

just remember that a 2d profile assume an inifinte aspect ratio and discrad the 3d effects, wich might be quite significative, both for performance and stall angle, on a real geometry.

November 22, 2011, 03:52	help needed for swept back wing simulation	#1
shaker New Member Shakerur Ridwan Join Date: Jun 2011 Posts: 2 Rep Power: 0	Hi all, Can anyone tell me how to simulate a swept back wing in 2d process? I found the geometry of swept back airfoil using matlab code,but found absurd result after simulation. The experimental data of naca shows the stall at 34 degree but i got the stall before 20 degree for the airfoil. Is it possible in this way?

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November 22, 2011, 05:47		#2
truffaldino Senior Member Join Date: Jan 2011 Posts: 249 Blog Entries: 5 Rep Power: 17	For incompressible (low speed subsonic) flow you can use XFLR5 (this software applies vortex lattice method in combination with drag polars from 2d sections).

November 28, 2011, 04:04		#3
shaker New Member Shakerur Ridwan Join Date: Jun 2011 Posts: 2 Rep Power: 0	thanks. is it possible in fluent using 2d airfoil?

November 28, 2011, 15:38		#4
sail Senior Member Vieri Abolaffio Join Date: Jul 2010 Location: Always on the move. Posts: 308 Rep Power: 16	i'm sorry but i might have missed something. what exactly do you mean 2d swept back wing? as for your last post, yes in fluent it is possible to simulate a 2d profile, but remember that the stall is extreamely hard to catch. EDIT: ok maybe i got it: you are talking about a profile deformed by the progection on the plane perpendicolar to the sweep. just remember that a 2d profile assume an inifinte aspect ratio and discrad the 3d effects, wich might be quite significative, both for performance and stall angle, on a real geometry.