Turbine Simulation

hencata · July 17, 2012, 12:14

Hello Everyone
I am a student and I am working with SolidWorks and ANSYS. in SolidWorks I did my CAD models, and I am exporting them to ANSYS. I am simulating a micro turbine, the turbine runner has to rotate on there own axis as the water strikes to the runner blades. I have many problems and I want to know if you can help me. If you have a tutorial or steps that you had used to solve the same problem, it will be good for me. I need to know all about domains definitions and connections between those.

I have not run the problem with steady state, but first I need to know the transient case. What should I do to run the problem.

Please Could you guide me.

Thanks a lot

ghorrocks · July 17, 2012, 20:31

There are a number of tutorials on rotating machines which come with CFX. Also there are more on the ANSYS Customer portal on the ANSYS website (you will need a login to access this).

hencata · July 18, 2012, 15:55

Thanks Glenn,

I read many tutorials, but all of them has a rotor with angular velocity. My case has an Inlet pressure, and a free rotor that is moved when the water pressure reaches the blades. I have two domains, one for fluid (Water in constant flow), and another for solid (Rotor). INLET and Outlet are part of fluid domain. I don't know if I need to define an interface between both domains. Also if my rotor must be defined as immersed solid or solid domain.

Thanks

ghorrocks · July 18, 2012, 19:42

Assuming you are looking for steady state performance:
The easiest way of doing this type of analysis when you do not know the operating speed is to use a standard rotating frame of reference approach, but sweep over a range of operating speeds. You can then interpolate to where the torque balances out and you have found the operating point.

This approach is much more accurate, faster and easier to implement than immersed solid or 6DOF approaches.

July 17, 2012, 12:14	Turbine Simulation	#1
hencata New Member henry Join Date: Sep 2010 Posts: 2 Rep Power: 0	Hello Everyone I am a student and I am working with SolidWorks and ANSYS. in SolidWorks I did my CAD models, and I am exporting them to ANSYS. I am simulating a micro turbine, the turbine runner has to rotate on there own axis as the water strikes to the runner blades. I have many problems and I want to know if you can help me. If you have a tutorial or steps that you had used to solve the same problem, it will be good for me. I need to know all about domains definitions and connections between those. I have not run the problem with steady state, but first I need to know the transient case. What should I do to run the problem. Please Could you guide me. Thanks a lot

July 18, 2012, 15:55	Turbine in CFX	#3
hencata New Member henry Join Date: Sep 2010 Posts: 2 Rep Power: 0	Thanks Glenn, I read many tutorials, but all of them has a rotor with angular velocity. My case has an Inlet pressure, and a free rotor that is moved when the water pressure reaches the blades. I have two domains, one for fluid (Water in constant flow), and another for solid (Rotor). INLET and Outlet are part of fluid domain. I don't know if I need to define an interface between both domains. Also if my rotor must be defined as immersed solid or solid domain. Thanks

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July 17, 2012, 20:31		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	There are a number of tutorials on rotating machines which come with CFX. Also there are more on the ANSYS Customer portal on the ANSYS website (you will need a login to access this).

July 18, 2012, 19:42		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Assuming you are looking for steady state performance: The easiest way of doing this type of analysis when you do not know the operating speed is to use a standard rotating frame of reference approach, but sweep over a range of operating speeds. You can then interpolate to where the torque balances out and you have found the operating point. This approach is much more accurate, faster and easier to implement than immersed solid or 6DOF approaches.