flow analysis of a submerged water turbine in Ansys 13

Anwerizer · July 28, 2012, 14:06

Hello,
I am a final year engineering student. My final year project is to analyse the water flow over a water turbine (SHP water turbine......you can check it out on their website http://www.smart-hydro.de/en/product/turbine.html ) used in mini-hydropower projects.
I have modeled the turbine in solid edge and also modeled a cylindrical water body and assembled it together with the water turbine. i used ansys 13 workbench to import this whole turbine-water assembly(in parasolid format) in the cfx analysis system. I want to know how to capture the flow stream lines using the rest of the cfx steps.
SO that includes:
1. should i mesh the water body only and leave the turbine as a solid. if yes then how can i do that?
2. How and what boundary conditions to apply?

ghorrocks · July 29, 2012, 08:27

Yes, mesh the water body only. Do not mesh the turbine. Model the turbine as a cavity in the mesh in a rotating frame of reference.

Boundary conditions can be many different types, but a common approach is upstream boundary condition should be the flow velocity. Down stream BC zero pressure.

Anwerizer · July 29, 2012, 08:40

ok....i got everything u said except the part about rotating frame of reference.......how can i define that? thanks for replying by the way

ghorrocks · July 29, 2012, 08:49

Rotating frames of reference is the nromal way of modelling rotating machinery. Have a look in the tutorials. There are plenty of examples of turbines and compressors. Also have a look at the best practises guide in the documentation.

Nealcaffrey · September 17, 2014, 09:54

Hi...Mohammed Anwer...how was your simulation btw..I am interested in your report if you dont mind...i would like to do a similar simulation on SHP Turbines.

Thanks.

July 28, 2012, 14:06	flow analysis of a submerged water turbine in Ansys 13	#1
Anwerizer New Member Mohammed Anwer Join Date: Jul 2012 Posts: 2 Rep Power: 0	Hello, I am a final year engineering student. My final year project is to analyse the water flow over a water turbine (SHP water turbine......you can check it out on their website http://www.smart-hydro.de/en/product/turbine.html ) used in mini-hydropower projects. I have modeled the turbine in solid edge and also modeled a cylindrical water body and assembled it together with the water turbine. i used ansys 13 workbench to import this whole turbine-water assembly(in parasolid format) in the cfx analysis system. I want to know how to capture the flow stream lines using the rest of the cfx steps. SO that includes: 1. should i mesh the water body only and leave the turbine as a solid. if yes then how can i do that? 2. How and what boundary conditions to apply?

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July 29, 2012, 08:27		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	Yes, mesh the water body only. Do not mesh the turbine. Model the turbine as a cavity in the mesh in a rotating frame of reference. Boundary conditions can be many different types, but a common approach is upstream boundary condition should be the flow velocity. Down stream BC zero pressure.

July 29, 2012, 08:40		#3
Anwerizer New Member Mohammed Anwer Join Date: Jul 2012 Posts: 2 Rep Power: 0	ok....i got everything u said except the part about rotating frame of reference.......how can i define that? thanks for replying by the way

July 29, 2012, 08:49		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	Rotating frames of reference is the nromal way of modelling rotating machinery. Have a look in the tutorials. There are plenty of examples of turbines and compressors. Also have a look at the best practises guide in the documentation.

September 17, 2014, 09:54		#5
Nealcaffrey New Member Balaji Join Date: May 2013 Posts: 21 Rep Power: 13	Hi...Mohammed Anwer...how was your simulation btw..I am interested in your report if you dont mind...i would like to do a similar simulation on SHP Turbines. Thanks.