Impulse Fan Loss of Momentum -- CFD Online Discussion Forums

August 5, 2014, 01:20

Impulse Fan Loss of Momentum

msmith

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Michael Smith

Join Date: Dec 2013

Location: Canberra, Australia

Posts: 17

Rep Power: 12

I'm modelling an impulse fan, as I have successfully previously, and am getting unexpected dramatic loss of momentum, much earlier than it should. See Image attached.

The exit velocity near the fan should be around 17m/s, not 6.3m/s and should still be above 1m/s for about 40m odd.

The meshing, while certainly not perfect, has been fine enough in the past for early results, however this is far too skewed.

Any ideas?

Attached Images

Copy of AltSol.jpg (75.5 KB, 3 views)

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