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مکانیک::
سرعت روتور
This observa- tion is consistent with the blade experiencing increased stiffness as a direct consequence of the higher centrifugal force, as the rotor speed increases.
Blade tuning through modification of the blade's taper characteristics may permit setting of the problem modes to above the rotor speed.
The 24E stimulus intersects all the blade modes at a low rotor speed; hence it is not of consequence.
In the CFD calculations the rotor speed may be adjusted to the resonance of the first blade mode for the sixth engine order.
Tip diameter, mm 600 600 Hub diameter, mm 490 490 Radial height, mm 55 55 Radial gap, mm - 0.4 Aspect ratio 0.887 0.917 Number of airfoils 36 41 Midspan pitch t, mm 47.6 41.8 Flow angle 20 90 Relative flow angle 49.3 151.2 Rotor speed, rpm - 3500
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