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August 24, 2015, 13:53 |
Negative torque_z()@blade
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#1 |
New Member
Alex
Join Date: Aug 2015
Posts: 3
Rep Power: 10 |
Good evening, help please. I am doing flow around the blade. With increasing rev/min^-1, torque_z()@blade becomes negative.
What is my fault? Tried to swap the axis -- no results When rev/min^-1, = 91 (λ = 4) -- all is well with rev/min^-1, = 137 (λ = 5) torque_z becomes negative |
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August 24, 2015, 18:16 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
Have a think about what this means. If the torque is negative then the rotor will slow down. This means you have exceeded the speed of the rotor.
That assumes your simulation is accurate. Your simulation could also be inaccurate - that is an FAQ: http://www.cfd-online.com/Wiki/Ansys..._inaccurate.3F |
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August 26, 2015, 09:57 |
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#3 |
New Member
Alex
Join Date: Aug 2015
Posts: 3
Rep Power: 10 |
Thank you very much for your answer.I will try to understand.
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