airfoil stall

November 21, 2007, 08:50

Hi!

I made simulation of flow around airfoil and I got very good results for AOA up to stall angle. I used SST model with gamma-theta transition model, y+ is less than 1 (about 0.75),... I tried with stady state simulation and also with transient but results were the same. Drag was near true but lift was too high because flow didn't separate. Can anybody tell me how can I improve results around stall angle!

Best Regards marek

November 21, 2007, 16:16

Hi,

A Reynolds averaged approach does not work well for a stalled airfoil. You need to go to LES or DES. Try either the SAS turbulence model or the DES model.

Glenn Horrocks

November 21, 2007, 08:50	airfoil stall	#1
marek Guest Posts: n/a	Hi! I made simulation of flow around airfoil and I got very good results for AOA up to stall angle. I used SST model with gamma-theta transition model, y+ is less than 1 (about 0.75),... I tried with stady state simulation and also with transient but results were the same. Drag was near true but lift was too high because flow didn't separate. Can anybody tell me how can I improve results around stall angle! Best Regards marek

November 21, 2007, 16:16	Re: airfoil stall	#2
Glenn Horrocks Guest Posts: n/a	Hi, A Reynolds averaged approach does not work well for a stalled airfoil. You need to go to LES or DES. Try either the SAS turbulence model or the DES model. Glenn Horrocks

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