Should I consider compressibility in fan simulation?

ivanbuz · May 20, 2011, 12:28

Hi all,

The fan has a diameter of about 0.8m and speed at 3000rpm. I want to get the fan power, static pressure rise across the fan, and fan efficiency. Should I use compressible flow or incompressible flow? How much difference will that make?

Thanks a lot,

Ivan

ghorrocks · May 21, 2011, 08:56

Why not run both and find out for yourself?

But in general when the Mach number is under 0.3 the difference between compressible and incompressible flow is under 1%.

May 20, 2011, 12:28	Should I consider compressibility in fan simulation?	#1
ivanbuz Member Ivan Join Date: May 2009 Posts: 85 Rep Power: 18	Hi all, The fan has a diameter of about 0.8m and speed at 3000rpm. I want to get the fan power, static pressure rise across the fan, and fan efficiency. Should I use compressible flow or incompressible flow? How much difference will that make? Thanks a lot, Ivan

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Modeling a Fan by the Multiple reference frame (MRF) method in CFX.	saisanthoshm88	CFX	11	February 17, 2021 12:30
I need comments from my 1st run simulation...plz	fadly	CFX	8	October 8, 2007 06:04
Fan boundary condition.	Alex	FLUENT	0	December 1, 2006 12:48
simulation of a fan...plz help	pankaj chaddah	FLUENT	4	July 13, 2006 13:34
Question concerning about the flow simulation of a fan in an engine room.	ghlee	Main CFD Forum	3	October 21, 1998 08:05

May 21, 2011, 08:56		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 18,017 Rep Power: 146	Why not run both and find out for yourself? But in general when the Mach number is under 0.3 the difference between compressible and incompressible flow is under 1%.