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August 11, 2008, 17:11 |
Pitches value problem
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#1 |
Guest
Posts: n/a
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Hi all,
I want to excute a transient simaulation of an isolated transonic Rotor 37 using ANSYS CFX 11 with rotation along one pitch, but the value of pitches displayed by the solver doesnt correspond to that i specified. my setup is as fellow : - Rotor 37 design speed = 17188.7 rpm = 1800 [rad/s] - 36 blades ===> 1 pitch = 2*3.1416/36 = 0.1745333 [rad] - total time to rotate along one pitch = 0.1745333/1800 = 9.7e-5 [s] - if i choose 100 time steps ===> DT = 9.7e-5/100 = 9.7e-7 [s]. I should see in each time step an increase of pitches by 0.01, but it is not the case !!!!!! what it can be the problem ????? and I could not get convergence???? any advice is very welcome. Regards, Noureddine |
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