Calculating RPM of a wind turbine

Somson · March 26, 2016, 04:49

Hey there,
I need to calculate the RPM of a wind turbine for school and i don't know how to do it. The initial data i got are the velocity of the wind the mass of the rotor and the momentum which is applied from the bearings. And I should find out the maximum rpm.
Can someone help me?

Far · March 27, 2016, 16:14

Quote:

Originally Posted by Somson

Hey there,
I need to calculate the RPM of a wind turbine for school and i don't know how to do it. The initial data i got are the velocity of the wind the mass of the rotor and the momentum which is applied from the bearings. And I should find out the maximum rpm.
Can someone help me?

Please refer to chapter 9 of Dixon book

turbo · March 27, 2016, 17:03

Go back to basic physics :
Power created by turbine = Torque x Omega(rad/s)
Torque = time change of angular momentum = mass flow rate x delta(r x Cu)

alxasli · March 29, 2016, 10:32

Basically, you need to find the rotational velocity (w) at which the torque created by the blade is equal to the moment created by the bearings. Just run the simulation with different RPMs and find out which one gives you the needed torque.

Somson · March 29, 2016, 15:07

Thanks for the quick replys

puri · July 14, 2016, 23:04

how can i calculate tip speed ratio and power cofficient in fluent .
i have gone through this forum and found cp=cm*tsr but these guys don't tell how to evaluate tsr and cm in detail.please help me i have a deadline of 1 week to meet... pictures will be appriciated

March 26, 2016, 04:49	Calculating RPM of a wind turbine	#1
Somson New Member Join Date: Mar 2016 Posts: 2 Rep Power: 0	Hey there, I need to calculate the RPM of a wind turbine for school and i don't know how to do it. The initial data i got are the velocity of the wind the mass of the rotor and the momentum which is applied from the bearings. And I should find out the maximum rpm. Can someone help me?

July 14, 2016, 23:04	TSR and cp	#6
puri New Member Manjil Puri Join Date: Jul 2016 Posts: 3 Rep Power: 9	how can i calculate tip speed ratio and power cofficient in fluent . i have gone through this forum and found cp=cm*tsr but these guys don't tell how to evaluate tsr and cm in detail.please help me i have a deadline of 1 week to meet... pictures will be appriciated

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March 27, 2016, 17:03		#3
turbo Senior Member Join Date: Jun 2009 Posts: 174 Rep Power: 16	Go back to basic physics : Power created by turbine = Torque x Omega(rad/s) Torque = time change of angular momentum = mass flow rate x delta(r x Cu)

March 29, 2016, 10:32		#4
alxasli New Member Join Date: May 2010 Posts: 10 Rep Power: 15	Basically, you need to find the rotational velocity (w) at which the torque created by the blade is equal to the moment created by the bearings. Just run the simulation with different RPMs and find out which one gives you the needed torque.

March 29, 2016, 15:07		#5
Somson New Member Join Date: Mar 2016 Posts: 2 Rep Power: 0	Thanks for the quick replys