Rotary kinetic fluid motors or pumps – With inspection – signaling – indicating or measuring means
Patent
1998-08-05
2000-01-04
Look, Edward K.
Rotary kinetic fluid motors or pumps
With inspection, signaling, indicating or measuring means
415 26, 415 47, 415 49, 415119, F01B 2512
Patent
active
060103035
ABSTRACT:
A system and method is provided for generating a real-time signal indicative of an energy-type instability precursor in a turbofan engine. A sensor is positioned in a compressor portion of a turbofan engine for generating a real-time signal indicative of energy of aerodynamic or aeromechanical resonance waves generated in the compression system. The signal is bandpassed to generate a filtered signal within a predetermined range of frequencies indicative of a precursor to instability such as rotating stall, surge or flutter. The bandpassed signal is squared in magnitude and then lowpassed to generate an instability precursor signal used to prevent imminent aerodynamic or aeromechanical instability from occurring in the aerocompression system.
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Look Edward K.
Nguyen Ninh
United Technologies Corporation
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