Torque driven rotor simulation

vinz · August 2, 2013, 11:16

Hi everybody,

Does someone know if it is possible to make a simulation of a rotor in OpenFOAM by fixing the torque instead of the rotation speed?

The simulation would have to take into account drag forces exerced by the flow on the rotor in order to increase or decrease the speed of the rotor.

The goald is to find a stable point and output the rotation speed.

Vincent

linnemann · August 2, 2013, 14:49

Its not present in the current code.

But you could just do a couple of fixed rpm simulations and find the peak value where the torque is the highest.

It wont necessarily give you what you want but it should be pretty close.

vinz · August 5, 2013, 04:36

Dear Niels,

Unfortunately it is not really what I want. In my case, I am not looking for a maximum torque.
The situation is that I have an asynchronous electrical motor which is able to give a certain power to my rotor. With this power, I want to be able to find the speed at which the rotor will rotate.

I might have to implement something on my own to do such a thing, but I'm not sure where to start.

August 2, 2013, 11:16	Torque driven rotor simulation	#1
vinz Senior Member Vincent RIVOLA Join Date: Mar 2009 Location: France Posts: 283 Rep Power: 18	Hi everybody, Does someone know if it is possible to make a simulation of a rotor in OpenFOAM by fixing the torque instead of the rotation speed? The simulation would have to take into account drag forces exerced by the flow on the rotor in order to increase or decrease the speed of the rotor. The goald is to find a stable point and output the rotation speed. Vincent

August 2, 2013, 14:49		#2
linnemann Senior Member Niels Nielsen Join Date: Mar 2009 Location: NJ - Denmark Posts: 556 Rep Power: 27	Its not present in the current code. But you could just do a couple of fixed rpm simulations and find the peak value where the torque is the highest. It wont necessarily give you what you want but it should be pretty close. __________________ Linnemann PS. I do not do personal support, so please post in the forums.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Torque calculation of 2D VAWT Wind Turbine	Anonymized_JL1	FLUENT	14	September 26, 2013 04:35
Torque Converter Pump Torque = Engine Torque?	Torque_Converter	Main CFD Forum	4	November 12, 2012 07:44
positive and negative torque forces	Wei-Haur Lam	CFX	0	March 19, 2008 08:45
Torque definition	Yali	CFX	2	January 7, 2008 04:13
about use macro to compute torque in TASCflow	lancy	CFX	0	June 10, 2003 07:19

August 5, 2013, 04:36		#3
vinz Senior Member Vincent RIVOLA Join Date: Mar 2009 Location: France Posts: 283 Rep Power: 18	Dear Niels, Unfortunately it is not really what I want. In my case, I am not looking for a maximum torque. The situation is that I have an asynchronous electrical motor which is able to give a certain power to my rotor. With this power, I want to be able to find the speed at which the rotor will rotate. I might have to implement something on my own to do such a thing, but I'm not sure where to start.