Airflow over Vertical Axis Wind TUrbine

sthoms78 · March 1, 2013, 10:03

Hi,

I'm trying to perform analysis on a vertical axis wind turbine using ansys workbench. I need to calculate the airflow through my designs. I don't have any experience using workbench and i was hoping some people have guides/tutorials that are easier to follow than those available on the ansys portal.

Thanks!

Drgo · March 2, 2013, 11:12

This is just the basics scott.

sthoms78 · April 2, 2013, 09:27

I'm mostly having issues with the initial setup of the meshing. I'm porting my model from pro engineer and creating an enclosure round it then meshing both enclosure/model. However in the setup phase of the cfx solver i can only see my enclosure and not my turbine. Does anyone know where I'm going wrong?

bahar · April 3, 2013, 05:09

You need to create some zones to mesh. Which method do you use as the technique of modeling for rotation of turbine? Which package are you using to create mesh?

Could you post a picture of your turbine?

Regards,
Bahar

sthoms78 · April 3, 2013, 13:39

Sorry, I don't have a clue which technique I'm using. It's not going to contra-rotating of anything like that. I'm meshing using the meshing tool available in ansys, that's probably not very helpful but i don't really know what I'm doing

Here's a link to my initial design
http://tinypic.com/r/2m2vwo8/6

ricardo.costa · April 3, 2013, 20:02

Hi,

Maybe you can try starting studying the documentation about turbomachinery. There is a special course developed by Ansys about this. Try to download it.

In your model, for example, you can an axisymmetric study with Rotational symmetry. In this way, you can make a most fine mesh increasing the quality of your results.

Regards,

Ricardo

bahar · April 4, 2013, 03:08

You have two rotating zone and one stationary(Domain). In order to create mesh around such a geometry you should divide domain to 3 parts and mesh each separately.
Which software are you using to mesh?

Regards,
Bahar

sthoms78 · April 4, 2013, 07:25

I am using ANSYS Workbench (with DM, Meshing and CFX), i don't have access to any external meshing software as I'm using my universities software.

For creating the 3 parts I'm guessing that one is the central shaft and the two rotating sections will be meshed separately too?

Thanks

bahar · April 10, 2013, 03:31

Hi,
I didn't worked that mesh tools, so I cannot help you in this way. But I have modeled a VAWT and I could help you by Defining Domain and Boundary Conditions.

You need two rotating zones related to each turbine and a stationary zone out of them as Domain. It dose not need to define a separate zone for central shaft.

How did you create your domain?

March 1, 2013, 10:03	Airflow over Vertical Axis Wind TUrbine	#1
sthoms78 New Member Join Date: Mar 2013 Posts: 4 Rep Power: 13	Hi, I'm trying to perform analysis on a vertical axis wind turbine using ansys workbench. I need to calculate the airflow through my designs. I don't have any experience using workbench and i was hoping some people have guides/tutorials that are easier to follow than those available on the ansys portal. Thanks!

April 3, 2013, 20:02	Turbomachinery	#6
ricardo.costa New Member Ricardo Join Date: May 2012 Posts: 8 Rep Power: 14	Hi, Maybe you can try starting studying the documentation about turbomachinery. There is a special course developed by Ansys about this. Try to download it. In your model, for example, you can an axisymmetric study with Rotational symmetry. In this way, you can make a most fine mesh increasing the quality of your results. Regards, Ricardo

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March 2, 2013, 11:12		#2
Drgo New Member b Join Date: Mar 2013 Posts: 1 Rep Power: 0	This is just the basics scott.

April 2, 2013, 09:27		#3
sthoms78 New Member Join Date: Mar 2013 Posts: 4 Rep Power: 13	I'm mostly having issues with the initial setup of the meshing. I'm porting my model from pro engineer and creating an enclosure round it then meshing both enclosure/model. However in the setup phase of the cfx solver i can only see my enclosure and not my turbine. Does anyone know where I'm going wrong?

April 3, 2013, 05:09		#4
bahar Member Bahar Join Date: May 2012 Posts: 46 Rep Power: 14	You need to create some zones to mesh. Which method do you use as the technique of modeling for rotation of turbine? Which package are you using to create mesh? Could you post a picture of your turbine? Regards, Bahar

April 3, 2013, 13:39		#5
sthoms78 New Member Join Date: Mar 2013 Posts: 4 Rep Power: 13	Sorry, I don't have a clue which technique I'm using. It's not going to contra-rotating of anything like that. I'm meshing using the meshing tool available in ansys, that's probably not very helpful but i don't really know what I'm doing Here's a link to my initial design http://tinypic.com/r/2m2vwo8/6

April 4, 2013, 03:08		#7
bahar Member Bahar Join Date: May 2012 Posts: 46 Rep Power: 14	You have two rotating zone and one stationary(Domain). In order to create mesh around such a geometry you should divide domain to 3 parts and mesh each separately. Which software are you using to mesh? Regards, Bahar

April 4, 2013, 07:25		#8
sthoms78 New Member Join Date: Mar 2013 Posts: 4 Rep Power: 13	I am using ANSYS Workbench (with DM, Meshing and CFX), i don't have access to any external meshing software as I'm using my universities software. For creating the 3 parts I'm guessing that one is the central shaft and the two rotating sections will be meshed separately too? Thanks

April 10, 2013, 03:31		#9
bahar Member Bahar Join Date: May 2012 Posts: 46 Rep Power: 14	Hi, I didn't worked that mesh tools, so I cannot help you in this way. But I have modeled a VAWT and I could help you by Defining Domain and Boundary Conditions. You need two rotating zones related to each turbine and a stationary zone out of them as Domain. It dose not need to define a separate zone for central shaft. How did you create your domain?