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January 16, 2010, 18:46 |
help regarding cfx
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#1 |
New Member
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hi, this is rohan student at northern illinois university,
i am a beginner with ansys CFX and right now i am using ansys cfx to analyse a wind turbine, please can some body help me in finding a tutorial for a wind turbine analysis or a wind turbine geometry file |
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January 17, 2010, 04:48 |
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#2 |
Senior Member
Attesz
Join Date: Mar 2009
Location: Munich
Posts: 368
Rep Power: 17 |
Hi,
in cfx help you can find a centrifugal compressor simulation. It's not the same, but the domains, interfaces, setting RPMs, boundary conditons, post processing etc. is similar to what you want to do. The difference between this and your simulation is mostly physical: lower pressure ratios, higher speeds, minimal temperature change...so do this tutorial first, if there isn't better. I think, in your case you should set inlet or opening velocity b.c. to simulate the wind, and a rotating speed of the blades. and watch this: http://www.cfd-online.com/Forums/cfx...imulation.html your simulation is like a propeller (in your case the wind rotates the propeller, but at me the engine does it), but the build-up of the simulation is similar. Please report your results later if it's possible, it's very interesting for me! Good luck, Attesz Last edited by Attesz; January 17, 2010 at 16:42. |
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January 18, 2010, 23:51 |
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#3 |
New Member
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thanks a lot, i will try my best and let u know as soon as possible
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February 27, 2010, 15:22 |
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#4 |
New Member
Nasir Bunjak
Join Date: Feb 2010
Posts: 3
Rep Power: 16 |
Hi, using this thread instead of a new one, because I have a similar question.
I am also doing a cfx (or trying to, Iam a newbe) simulation of a windturbine. So far, I have created a assembly in Pro/e consisting of 3 blades and a hub ( eventually a tower connected) . I tried to import the geometry in 10 different format, until it worked with igs(?) format, to the design modeler. Now, as I understand, I have to extrude a cirkel around the model I created, to have a mesh for wind simulation. So, I have to freeze my windturbine model, before I éxtrude. When I have done this, the windturbine is not visible because of the cirkel extrude. Can I make it transparent somehow, so I can se the other model to when I mesh. I want to mesh the "cirkel" extrude, and blades seperatly. Also, when I use CFX post, I assume I have to have a domain, made of my blade+ hub, to give i fix rotation to? And, do a need to model a axle connected to the hub, because I want the torque calculated on the shaft, due to the wind load? Maybe not straightforward question but i need some point directions. Thank you in advance |
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February 28, 2010, 14:29 |
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#5 |
New Member
Nasir Bunjak
Join Date: Feb 2010
Posts: 3
Rep Power: 16 |
Anyone? .
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February 28, 2010, 17:49 |
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#6 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,738
Rep Power: 143 |
I am not sure what you are asking, but what you are talking about seems to be basic rotating frames of reference stuff. Have you done the tutorials which come with CFX? They are the first place to look for setting up new models.
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February 28, 2010, 17:54 |
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#7 | |
New Member
Nasir Bunjak
Join Date: Feb 2010
Posts: 3
Rep Power: 16 |
Quote:
And the way to go if I want the torque delivered to the shaft. |
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May 14, 2010, 12:35 |
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#8 |
Senior Member
Join Date: Feb 2010
Posts: 148
Rep Power: 17 |
I think it would be better to create an enclosure (Tools > Enclosure). However, one could sketch a circle, extrude the circle, use Body Operation to cut out the solid.
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