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How to implement swirling phenomenon to model FAN

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Old   January 9, 2006, 00:40
Default How to implement swirling phenomenon to model FAN
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OPticdesigner
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HI I tried to use EFD.Lab to model a DC Axial Fan. How do I implement swirling phenomenon on the DC Axial fan?

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Old   January 9, 2006, 04:37
Default Re: How to implement swirling phenomenon to model
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Harry Fulmer
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Buy Flotherm.
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Old   January 9, 2006, 07:41
Default Re: How to implement swirling phenomenon to model
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TITAN Algorithms, Staff
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Dear OpticDesigner:

Swirl flows out of a fan can be implemented by setting tangential face velocity boundary conditions on the lea side of your fan object.

See the example I created at the following link: http://CFD.TITANAlgorithms.com

The fan model demonstrated on this page shows that a uniform swirl that can be created with just a small dedicated setup of control surfaces to create the swirl.

If you are interested in the model, I would be happy to provide it for you.

Kind Regards,

DSS www.TITANAlgorithms.com
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Old   January 9, 2006, 08:16
Default Re: How to implement swirling phenomenon to model
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Harry Fulmer
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Wow, nice response!

The swirl is a function of the operating point of the fan, at high flow rates the proportion of swirl to axial velocity is reduced. This is all related to the fan efficiency curve.
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