Fan Diffuser

johntynanrrp · August 31, 2015, 16:41

Has anybody simulated an outlet diffuser on an axial fan. I am running some moving reference frame simulations with a mixing plane and without the diffuser I am seeing mass flow rates in line with the expected data sheet values. However I am seeing no increase in flow rate when I add the diffuser. Increase should be around 13%. I have tried some standard solution, increase inlet and outlet plenum size, refine the mesh. Has anybody dealt with this problem specifically before.

Thanks,
John

fluid23 · September 1, 2015, 12:04

This is most likely a result of your model/setup. Can you share some pictures of your domain/model to get a feel for what you are actually trying to analyze?

August 31, 2015, 16:41	Fan Diffuser	#1
johntynanrrp New Member Anon Join Date: Jun 2015 Posts: 6 Rep Power: 10	Has anybody simulated an outlet diffuser on an axial fan. I am running some moving reference frame simulations with a mixing plane and without the diffuser I am seeing mass flow rates in line with the expected data sheet values. However I am seeing no increase in flow rate when I add the diffuser. Increase should be around 13%. I have tried some standard solution, increase inlet and outlet plenum size, refine the mesh. Has anybody dealt with this problem specifically before. Thanks, John

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September 1, 2015, 12:04		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 17	This is most likely a result of your model/setup. Can you share some pictures of your domain/model to get a feel for what you are actually trying to analyze?