reference values for transient analysis

dynamic · July 27, 2015, 10:47

Hi,
Im carrying out analysis on a vertical axis turbine in 2d, my turbine has three blades of 200 mm chord length the diameter of the turbine is 600 mm, I'm using a sliding mesh of diameter 800mm. I'm using a transition sst turbulence model.

I have set up a monitor for Cm around the center of the aerofoils, but I am unsure as to what I have to set my reference values for Area, Depth and length I want to use these Cm to give me a Cp for my turbine.

Any advice would be deeply appreciated and thanks in advance

davd4696@gmail.com · August 3, 2015, 16:51

Hi,
Just wondering have you found a solution to this?

as I find the reference values requirement confusing as well

Thanks

dynamic · August 5, 2015, 06:41

Hi Davd,

I know as I'm doing my calculation in 2d depth should be left at 1m to make the rest pure unit length,

as for the area I'm unsure whether this should be the area taken up the blades or the area taken up by the rotating mesh itself.

and the same for the length should this be one of the diameters or radius of one of the above, I was thinking Radius of the Turbine as I'm looking for the Torque but Im unsure.

Thanks

July 27, 2015, 10:47	reference values for transient analysis	#1
dynamic New Member Ronald Thompson Join Date: Mar 2015 Location: Portland, Oregon, USA Posts: 25 Rep Power: 11	Hi, Im carrying out analysis on a vertical axis turbine in 2d, my turbine has three blades of 200 mm chord length the diameter of the turbine is 600 mm, I'm using a sliding mesh of diameter 800mm. I'm using a transition sst turbulence model. I have set up a monitor for Cm around the center of the aerofoils, but I am unsure as to what I have to set my reference values for Area, Depth and length I want to use these Cm to give me a Cp for my turbine. Any advice would be deeply appreciated and thanks in advance dasterly likes this.

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August 3, 2015, 16:51		#2
davd4696@gmail.com New Member david glynn Join Date: Aug 2015 Posts: 10 Rep Power: 11	Hi, Just wondering have you found a solution to this? as I find the reference values requirement confusing as well Thanks

August 5, 2015, 06:41		#3
dynamic New Member Ronald Thompson Join Date: Mar 2015 Location: Portland, Oregon, USA Posts: 25 Rep Power: 11	Hi Davd, I know as I'm doing my calculation in 2d depth should be left at 1m to make the rest pure unit length, as for the area I'm unsure whether this should be the area taken up the blades or the area taken up by the rotating mesh itself. and the same for the length should this be one of the diameters or radius of one of the above, I was thinking Radius of the Turbine as I'm looking for the Torque but Im unsure. Thanks