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May 30, 2012, 01:34 |
torque calculation of impulse turbine
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#1 |
Member
liping_he
Join Date: Feb 2011
Posts: 36
Rep Power: 15 |
Dear foamers
I created a case by combining the interDyMFoam (tutorials/multiphase/interDyMFoam/ras/damBreakWithObstacle) and pimpleDyMFoam (tutorials/incompressible/pimpleDyMFoam/propeller) to achieve the simulation of impulse turbine (multiphases flow and AMI). The screenshot of velocity field is shown in attachment containing three nozzles and a runner. And now, I want to calculate the efficiency. A great issue comes out HOW can i obtain the torque (pressure and viscocity torque ) of runner. I have no idea about this issue. Any advice will be appreciated. |
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May 30, 2012, 03:54 |
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#2 |
Senior Member
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Haven't got much of experience on this but… couldn't you just use a force calculation to computer the moment aruond the axis of rotation?
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May 30, 2012, 20:44 |
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#3 | |
Member
liping_he
Join Date: Feb 2011
Posts: 36
Rep Power: 15 |
Hi,
Now, I dont know how to report force in multiphase case. So i cant obtain torque without force. In singlephase case, the force/torque can be obtained by adding the following code in controlDict Quote:
http://www.cfd-online.com/Forums/ope...es-of15-8.html regards, liping |
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