Axial Fan Mesh

Turbomachine · February 10, 2011, 05:01

Dear All,

Please take a look at this mesh, which is a meridonial view of a fan blade passage.

I was wondering does the inlet and outlet have to be vertical, i.e. normal to the flow direction in the axial-radial plane?

This would obviously cause a large stretching of the elements near the top of the mesh and would negatively affect the mesh quality. However is this necessary for a correct representation?

I am using total pressure at inlet and static pressure at outlet boundary conditions.

Thank you

ghorrocks · February 10, 2011, 05:16

No, the boundary does not need to be normal to the flow. Things are a little nicer if they are normal, but you can run it not normal.

Turbomachine · February 10, 2011, 05:37

Thank you for your reply Glenn!

I am trying to run the case with the corrected mesh as well to see how much it affects the efficiency.

February 10, 2011, 05:01	Axial Fan Mesh	#1
Turbomachine Member Join Date: Aug 2010 Posts: 31 Rep Power: 16	Dear All, Please take a look at this mesh, which is a meridonial view of a fan blade passage. I was wondering does the inlet and outlet have to be vertical, i.e. normal to the flow direction in the axial-radial plane? This would obviously cause a large stretching of the elements near the top of the mesh and would negatively affect the mesh quality. However is this necessary for a correct representation? I am using total pressure at inlet and static pressure at outlet boundary conditions. Thank you

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February 10, 2011, 05:16		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	No, the boundary does not need to be normal to the flow. Things are a little nicer if they are normal, but you can run it not normal.

February 10, 2011, 05:37		#3
Turbomachine Member Join Date: Aug 2010 Posts: 31 Rep Power: 16	Thank you for your reply Glenn! I am trying to run the case with the corrected mesh as well to see how much it affects the efficiency.