Dear readers, what is the swept area of H-Darrieus wind turbine,to use in "Fluent", that connects three Naca blades ? I read that it's equal to 2/3*hydraulic diameter, but it doesn't give an accurate results .
Thank you M.Rakesh. Could you please send me the publications that I requested.
The swept area should be Diameter*Height of the turbine. If you are making it 2D, you should look for the standard height that FLUENT takes in account for calculation. If I'm not wrong, is 1 m.
Regards,
Yes dear Mónica, you are right. It is all about the reference values in FLUENT. I am working on a hybrid divice that combines Savonis which is inside Darrieus. In this case we are going to have two spewts areas, however we can only set one value in FLUENT.Do you have please any suggestion ?
I would use the total area (which should be the darrieus diameter*height), since I'd see it as a combined one big turbine, and those are the biggest dimensions of the system.
Regards,
Fertahi,
I have attached publication in my publication list. Please look at the following paper.Computational Fluid Dynamics Based Optimal Design of Vertical Axis Marine Current Turbines
Mr Rakesh,
Your article is very interesting and inspiring. The fact that you monitered pressure in some critical points will help me to analyse de performance of my hybride VACT.
In your case, the swept area was the frontal one which means (the stator diametre*height of the turbine =2*0.5= 1 m² ).
Cheers,
The parameter Swept Area was first used for HAWTs I think, the area swept by the Blades. In the case of VAWTs there are two different definitions regarding literature:
Swept Area = πDH
Frontal Swept Area = DH
In my case, in which I am focusing the parameter Rotor Solidity I think πDH makes more sense.
Refer to,
1.An Experimental Investigation into the Influence of Unsteady Wind on the Performance of a Vertical Axis Wind Turbine
2.An Experimental Study of the Characteristics of a Darrieus Turbine for Tidal Power Generation
typically swept area for energy conversion is taken as D*H for a H Darrieus turbine, though the real area is PI*D*H. I have not found, up to now, a thorough theoretical analysis for this question.
Swept area for VAWT is given by the product of rotor height and the rotor diameter...
eg: if the rotor diameter is 30 cm and rotor height is 40 cm.. then swept area of VAWT is 1200 Sq. cm.
But in HAWT, swept area is given = Pi * R^2= considering the same example, rotor diameter i.e., 30 cm , then swept area = 3.14*15^2=94.2 Sq. cm
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