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Keywords: shafts
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Journal Articles
Article Type: Research Papers
J. Turbomach. October 2011, 133(4): 041030.
Published Online: April 27, 2011
...Jean Thomassin; Huu Duc Vo; Njuki W. Mureithi Nonsynchronous vibration (NSV) is a particular type of aero-elastic phenomenon, where the rotor blades vibrate at nonintegral multiples of the shaft rotational frequencies. NSV behavior appears similar to off-design stall flutter but with a particular...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2011, 133(2): 021022.
Published Online: October 26, 2010
...M. Haake; R. Fiola; S. Staudacher A mathematical model for the prediction of the maximum speed of a high pressure turbine following a shaft failure event was developed. The model predicts the high pressure compressor and ducting system pre- and poststall behaviors such as rotating stall and surge...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2009, 131(1): 011013.
Published Online: October 28, 2008
... blades vibrate at nonintegral multiples of the shaft rotational frequencies in operating regimes where classical flutter is not known to occur. A physical mechanism to explain the NSV phenomenon is proposed based on the blade tip trailing edge impinging jetlike flow, and a novel theory based...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2007, 129(3): 479–487.
Published Online: July 23, 2006
..., will be quiet relative to current turbofans. To reduce the engine weight, a system with a gearbox, or some other form of shaft speed reduction device, is proposed. This is combined with a low-speed fan and a turbine with high gap-chord spacing to further reduce turbomachinery source noise. An engine...