fluid injection in fan domain

drcsm · June 3, 2015, 09:41

Dear all,

I would like to simulate air injection in axial fan. The mesh for rotor and stator domain was generated using turbogrid. Now i wiuld like to put injector to inject air at the inlet. How do i proceed in such case. My confusion is
1.How to model and mesh this case. Like freeze the injector in inlet domain and what should be the length of injector for simulation?
2. BConditions for fan as inlet mass flow and total pressure outlet. But what about injector ? The mass flow rate is known to me.
3. If i have even number than shall i take blade passage accordingly and if odd number of injectrors than do i use full domain?

Please guide me for the same

Thanks

mshalby82 · June 10, 2015, 06:58

Hi all
I'm a new user to CFX, I need to create sinusoidal velocity input to the turbine how can I create this function

ghorrocks · June 10, 2015, 07:21

Chetan:
1: Model the mesh as the real geometry looks. Pretty simple really.
2: You have to know something about the injector. If you do not know anything you cannot model it.
3: If you cannot work out pitch ratios then just model the full geometry.

Mohammad:
Please do not hijack threads. Start a new thread for a new question.

June 3, 2015, 09:41	fluid injection in fan domain	#1
drcsm New Member Chetan Join Date: Mar 2015 Posts: 7 Rep Power: 12	Dear all, I would like to simulate air injection in axial fan. The mesh for rotor and stator domain was generated using turbogrid. Now i wiuld like to put injector to inject air at the inlet. How do i proceed in such case. My confusion is 1.How to model and mesh this case. Like freeze the injector in inlet domain and what should be the length of injector for simulation? 2. BConditions for fan as inlet mass flow and total pressure outlet. But what about injector ? The mass flow rate is known to me. 3. If i have even number than shall i take blade passage accordingly and if odd number of injectrors than do i use full domain? Please guide me for the same Thanks

June 10, 2015, 06:58	CFX input velocity as Sinusoidal	#2
mshalby82 New Member Mohammad Shalby Join Date: Jun 2015 Posts: 1 Rep Power: 0	Hi all I'm a new user to CFX, I need to create sinusoidal velocity input to the turbine how can I create this function

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June 10, 2015, 07:21		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 18,001 Rep Power: 146	Chetan: 1: Model the mesh as the real geometry looks. Pretty simple really. 2: You have to know something about the injector. If you do not know anything you cannot model it. 3: If you cannot work out pitch ratios then just model the full geometry. Mohammad: Please do not hijack threads. Start a new thread for a new question.