# full simulation of an aircraft with propeller effect

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 June 17, 2010, 10:25 full simulation of an aircraft with propeller effect #1 Member     Burak Join Date: May 2009 Posts: 90 Rep Power: 10 Hi all, I searched the forum but no clear answers. In order to simulate an aircraft with a propeller at the front (let's say it is a cessna 172): In gambit: (1)Can I simulate the propeller by a circular zero-thickness surface? (2)If yes, should I split the volume with that surface? (3)Which boundary condition must be given to that surface? In fluent: (4)With that boundary condition given in gambit, during steady state analysis, will it suck the air in front of the propeller and give it back with much more velocity/pressure? (5)Can I give the rotating effect of air after the propeller? Thanks in advance. Burak

 June 17, 2010, 10:47 #2 New Member   Kamil Sobczak Join Date: Jan 2010 Location: Warsaw, Poland Posts: 6 Rep Power: 10 In gambit: (1)Can I simulate the propeller by a circular zero-thickness surface? - Yes you can. (2)If yes, should I split the volume with that surface? - This is correct operation. (3)Which boundary condition must be given to that surface? - Fan will be good. In fluent: (4)With that boundary condition given in gambit, during steady state analysis, will it suck the air in front of the propeller and give it back with much more velocity/pressure? - In b.c. panel you can input value of constant pressure jump - Force generated by propeller divided by area of propeller surface. (5)Can I give the rotating effect of air after the propeller? - Default option in fan b.c. panel allows some swirl velocity but I don't understand how this works. So I input udf function to simulate rotating velocity. But if your model is a simplification of propeller by surface I'm not seeing a point to include rotating effect in a simulation.

 June 18, 2010, 01:29 #3 Member     Burak Join Date: May 2009 Posts: 90 Rep Power: 10 Hi Kamil, Thanks for your reply. I will try it as soon as possible. By swirling effect, I just wondered if I can see the swirling air hitting to the vertical stabilizer. This was just for fun

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