nozzle/swirler geometry combustion chamber modeling

magnusDux85 · August 11, 2013, 18:10

Hello,

during my MSc thesis I am interested in combustion chamber modeling in CFX. The biggest problem in my case is making the air flow swirly to obtain good mixing properties.

Due to that I am looking for nozzle/swirler geometry, is anybody who can share such geometry?

Thanks

ghorrocks · August 11, 2013, 19:38

Do you plan to model the swirler with CFD so you need the exact geometry of it, or do you intend to just model its effects (so the swirler can be replaced with a flow of specified velocity and direction)?

And surely the swirler geometry you should be interested in is the one which you are using on your experimental rig.

magnusDux85 · August 12, 2013, 05:20

The best option I guess its model ist effect but it is very complicated.

ghorrocks · August 12, 2013, 07:23

Of course it is complicated, that is why you are doing a masters on it. But the skill of the CFD practitioner is to model it accurately enough to capture the essential physics while ignoring the non-essential detail.

magnusDux85 · August 12, 2013, 10:52

I draw fan geometry in SW and I want attach it to the combustion chamber model, how to make it?

ghorrocks · August 12, 2013, 19:29

As I previously said, you can either include it in your simulation geometry and model it directly, or you can replace it with a flow which represents its effect, maybe jets of a defined flow velocity.

diamondx · August 12, 2013, 20:44

May be this can do the job :

You will need to adapt it to your geometry, remove unnecessary parts in Designmoder, scale it if you need to. I opened it in Designmodeler, there is indeed a swirler at the tip. mesh it. I hope it can help

https://dl.dropboxusercontent.com/u/...e%202-Step.rar

magnusDux85 · August 13, 2013, 08:25

As a swirling element I used simple fan geometry and I am checking how it works now.

August 11, 2013, 18:10	nozzle/swirler geometry combustion chamber modeling	#1
magnusDux85 Member Michal Join Date: Dec 2012 Posts: 39 Rep Power: 14	Hello, during my MSc thesis I am interested in combustion chamber modeling in CFX. The biggest problem in my case is making the air flow swirly to obtain good mixing properties. Due to that I am looking for nozzle/swirler geometry, is anybody who can share such geometry? Thanks

August 12, 2013, 20:44		#7
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	May be this can do the job : You will need to adapt it to your geometry, remove unnecessary parts in Designmoder, scale it if you need to. I opened it in Designmodeler, there is indeed a swirler at the tip. mesh it. I hope it can help https://dl.dropboxusercontent.com/u/...e%202-Step.rar __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

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August 11, 2013, 19:38		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Do you plan to model the swirler with CFD so you need the exact geometry of it, or do you intend to just model its effects (so the swirler can be replaced with a flow of specified velocity and direction)? And surely the swirler geometry you should be interested in is the one which you are using on your experimental rig.

August 12, 2013, 05:20		#3
magnusDux85 Member Michal Join Date: Dec 2012 Posts: 39 Rep Power: 14	The best option I guess its model ist effect but it is very complicated.

August 12, 2013, 07:23		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Of course it is complicated, that is why you are doing a masters on it. But the skill of the CFD practitioner is to model it accurately enough to capture the essential physics while ignoring the non-essential detail.

August 12, 2013, 10:52		#5
magnusDux85 Member Michal Join Date: Dec 2012 Posts: 39 Rep Power: 14	I draw fan geometry in SW and I want attach it to the combustion chamber model, how to make it?

August 12, 2013, 19:29		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	As I previously said, you can either include it in your simulation geometry and model it directly, or you can replace it with a flow which represents its effect, maybe jets of a defined flow velocity.

August 13, 2013, 08:25		#8
magnusDux85 Member Michal Join Date: Dec 2012 Posts: 39 Rep Power: 14	As a swirling element I used simple fan geometry and I am checking how it works now.