turbine Rpm

ahahha · December 11, 2010, 22:26

hi, i not sure is that correct to put here, but i am actually try to determine the rpm of rotor given a particular flow rate and air velocity.

is that possible?and by using what method?

thanks for the help.

ghorrocks · December 12, 2010, 00:06

Yes, it is possible.

Guess an rpm. Do the simulation. Check whether you too fast or too slow by looking at the torque on the rotor and knowledge of the torque load applied. Adjust the rpm and keep iterating until you get the accuracy you require.

ahahha · December 12, 2010, 03:13

thanks for the reply ghorrocks

how am i going to run rotor simulation without stator?
and how to get the torque value of rotor?

do you have any info on this?

ghorrocks · December 12, 2010, 05:48

No problem running a rotor without a stator. If this is what the device is then it works fine. Just make sure you get your inlet and outlet boundary conditions specified correctly with respect to frames of reference.

Either use the CEL torque function or the CFD-Post calculator of get torque of the rotor.

ahahha · December 12, 2010, 07:54

thanks for help....you really give me some hope to go through the ansys simulation

by the way, for the bladegen, i create and link to cfx.it appear like following graphic.

how to determine the boundaries since so many part?

and the hub look gone. left blade only.any solution?

thanks

December 11, 2010, 22:26	turbine Rpm	#1
ahahha New Member anonymous Join Date: Dec 2010 Posts: 7 Rep Power: 16	hi, i not sure is that correct to put here, but i am actually try to determine the rpm of rotor given a particular flow rate and air velocity. is that possible?and by using what method? thanks for the help.

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December 12, 2010, 00:06		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	Yes, it is possible. Guess an rpm. Do the simulation. Check whether you too fast or too slow by looking at the torque on the rotor and knowledge of the torque load applied. Adjust the rpm and keep iterating until you get the accuracy you require.

December 12, 2010, 03:13		#3
ahahha New Member anonymous Join Date: Dec 2010 Posts: 7 Rep Power: 16	thanks for the reply ghorrocks how am i going to run rotor simulation without stator? and how to get the torque value of rotor? do you have any info on this?

December 12, 2010, 05:48		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	No problem running a rotor without a stator. If this is what the device is then it works fine. Just make sure you get your inlet and outlet boundary conditions specified correctly with respect to frames of reference. Either use the CEL torque function or the CFD-Post calculator of get torque of the rotor.

December 12, 2010, 07:54		#5
ahahha New Member anonymous Join Date: Dec 2010 Posts: 7 Rep Power: 16	thanks for help....you really give me some hope to go through the ansys simulation by the way, for the bladegen, i create and link to cfx.it appear like following graphic. how to determine the boundaries since so many part? and the hub look gone. left blade only.any solution? thanks