How do you calculate torque produced by high speed winds on a turbine

[Donald Ewing]

Salutations... I am new to this and have a project that I am working on for power generation in high wind conditions and could use some enlightenment.

I am using a proprietary, lite weight turbine (impeller) design, enclosed in a duct, that has the following dimensions:

1. 4 blade turbine
2. ​
   (impeller type, 2" shaft),
3. ​
   (the blades are 3" foil design)
4. 8" total turbine diameter
5. 3' in length

I have tested the turbine at sea level, with variable wind velocity of:

1. 20 mph = 1,200 rpm
2. 50 mph = 3,000 rpm
3. 100 mph = 5,000+ rpm

How do you calculate the torque that is produced by the spinning turbine at the various wind velocities?

Any enlightenment is greatly appreciated. Thanks...,

 

[rock.freak667]

From a simplistic approach, you can get the power of the turbine based on the wind velocity. I can't remember the exact formula but the power was basically proportional to the velocity³. Then just use power divided angular velocity.

However, you should check to see if there any official design codes for these things as I would believe that the blade angle would affect the power input to the turbine. It might possibly be the basic same way as calculating power from a steam turbine.