Airfoil Investigation (changing angle of attack)

raven · July 17, 2014, 14:39

Hello,

Over the past weeks, I have made decent meshes for different airfoils using ICEM and the simulations have been yielding good results (compared to experimental values). Up until now I have been manually changing the velocity components of the inlet flow to change the angle of attack which is rather time consuming. I now have to repeat this process many times for many different airfoils, and I was wondering if there were more efficient ways to go about this.

I can think of some ways but I do not know if they are possible in ANSYS CFX

-run one transient simulation where the angle of attach varies and record the forces on the airfoil at defined angles.

-predefine all the velocities (like as txt file) and have ANSYS read in the velocities (kind of like a script file) and simulate all velocities in one run

If anyone has any experience in this area, I would greatly appreciate your advice and comments.

Thank you.

ghorrocks · July 17, 2014, 18:16

You can do this in workbench using parameters. Alternately you can also do this with different CCL files and script them all together.

M MOHSIN · July 22, 2014, 02:52

Hi Sir

Hope so you will be fine and good.

Sir i have a question regarding thrust of a propeller.

Why Thrust of a propeller decreases with increase in Advanve Ratio???

Similarly Torque of Propeller ???

only propeller thrust and torque without engine.
Thanks

Looking Forward

July 17, 2014, 14:39	Airfoil Investigation (changing angle of attack)	#1
raven New Member Dustin Join Date: May 2014 Posts: 11 Rep Power: 11	Hello, Over the past weeks, I have made decent meshes for different airfoils using ICEM and the simulations have been yielding good results (compared to experimental values). Up until now I have been manually changing the velocity components of the inlet flow to change the angle of attack which is rather time consuming. I now have to repeat this process many times for many different airfoils, and I was wondering if there were more efficient ways to go about this. I can think of some ways but I do not know if they are possible in ANSYS CFX -run one transient simulation where the angle of attach varies and record the forces on the airfoil at defined angles. -predefine all the velocities (like as txt file) and have ANSYS read in the velocities (kind of like a script file) and simulate all velocities in one run If anyone has any experience in this area, I would greatly appreciate your advice and comments. Thank you.

July 22, 2014, 02:52	Thrust Problem	#3
M MOHSIN New Member M Mohsin Iqbal Join Date: Jan 2014 Location: National University Sciencies & Technology, Pakistan Posts: 17 Rep Power: 12	Hi Sir Hope so you will be fine and good. Sir i have a question regarding thrust of a propeller. Why Thrust of a propeller decreases with increase in Advanve Ratio??? Similarly Torque of Propeller ??? only propeller thrust and torque without engine. Thanks Looking Forward

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July 17, 2014, 18:16		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,697 Rep Power: 143	You can do this in workbench using parameters. Alternately you can also do this with different CCL files and script them all together.