airfoil stall

November 21, 2007, 09:50

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, 17:16

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, 09:50	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, 17:16	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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Determining Stall Angle of 2D Airfoil	Active.Aero.Fiero	FLUENT	3	October 27, 2010 10:07
Airfoil in Stall - Turbulent model.	Jack	FLUENT	0	November 7, 2008 03:53
Airfoil at stall angle	cfd_newbie	FLUENT	10	February 5, 2008 12:33
Modelling flow over airfoil at near stall angle	Kelvin	FLUENT	5	June 6, 2007 03:00
Airfoil in stall	Park Geun Hong	FLUENT	4	February 24, 2000 22:00