full simulation of an aircraft with propeller effect

kdrbrk · June 17, 2010, 10:25

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

KamilSobczak · June 17, 2010, 10:47

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.

kdrbrk · June 18, 2010, 01:29

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

Venkatakrishnan · January 17, 2024, 03:08

I need to do this type of simulation where i need to calculate thrust and lift by transient analysis in ansys fluent. Can you help me to find how to proceed with it? i separated propeller from aircraft and gave cylinder enclosure for propeller and box enclosure for entire aircraft and propeller. Then i boolean subtracted the propeller from the cylinder enclosure and aircraft from box enclosure and cylinder from box enclosure with retain body of propeller. But how should i give constrain ?

I use transient solver with SST k omega, coupled solver and frame motion for rotating propeller which is not in origin of the coordinates.

I amgeting wrong results. what should i do?

June 17, 2010, 10:25	full simulation of an aircraft with propeller effect	#1
kdrbrk Member Burak Join Date: May 2009 Posts: 90 Rep Power: 16	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

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June 17, 2010, 10:47		#2
KamilSobczak New Member Kamil Sobczak Join Date: Jan 2010 Location: Warsaw, Poland Posts: 6 Rep Power: 16	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
kdrbrk Member Burak Join Date: May 2009 Posts: 90 Rep Power: 16	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

January 17, 2024, 03:08		#4
Venkatakrishnan New Member Venkat Join Date: Jan 2024 Location: India Posts: 2 Rep Power: 0	I need to do this type of simulation where i need to calculate thrust and lift by transient analysis in ansys fluent. Can you help me to find how to proceed with it? i separated propeller from aircraft and gave cylinder enclosure for propeller and box enclosure for entire aircraft and propeller. Then i boolean subtracted the propeller from the cylinder enclosure and aircraft from box enclosure and cylinder from box enclosure with retain body of propeller. But how should i give constrain ? I use transient solver with SST k omega, coupled solver and frame motion for rotating propeller which is not in origin of the coordinates. I amgeting wrong results. what should i do?