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January 24, 2012, 05:17 |
Wind Turbine RPM in CFD
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#1 |
Senior Member
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Hi All
I want to run steady simulations of a wind turbine blade but I want that I don't need to specify rpm in the software rather the program itself rotate the blade and calculate rpm. I will have to specify only the wind velocity. Is it possible in case of steady state simulations? Regards |
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January 27, 2012, 19:16 |
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#2 |
New Member
Dustin
Join Date: Jan 2012
Posts: 18
Rep Power: 14 |
Is the problem that you don't know the RPM of the turbine and would like to model the steady state at a realistic speed? Or are you trying to do something more complex?
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January 30, 2012, 09:12 |
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#4 | |
New Member
Join Date: Aug 2009
Posts: 15
Rep Power: 17 |
Quote:
Hi Shamoon, what software are you using? The approach I woud use would be to define a rotating region around the blades and assign an (estimated RPM). When you've a solution I'd measure the torque on the blades and adjust the RPM accordingly, and re-run. When the torque approaches zero, would this not indicate the operating RPM at the given boundary conditions? I appreciate the above might seem a little long-winded (no pun intended) but you could probably set up a monitor point which measures the torque on the blades so you could change the RPM dynamically during the solving process. |
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February 13, 2012, 13:42 |
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#5 |
Senior Member
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Your quote
"Hi Shamoon, what software are you using? The approach I woud use would be to define a rotating region around the blades and assign an (estimated RPM). When you've a solution I'd measure the torque on the blades and adjust the RPM accordingly, and re-run. When the torque approaches zero, would this not indicate the operating RPM at the given boundary conditions? I appreciate the above might seem a little long-winded (no pun intended) but you could probably set up a monitor point which measures the torque on the blades so you could change the RPM dynamically during the solving process." Your quote has raised a few questions: In the first para what do you mean by "When the torque approaches zero" Does it mean that while observing the monitor for Cm about an axis the moments become constant (although still it cant be zero I believe). Why to monitor some point to measure the torque while this can be done with monitor Moment coefficient about the rotation axis. How can the RPM be changed dynamically with this? |
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