Compressor stall and surge control using airflow asymmetry measurement
Patent 5915917 Issued on June 29, 1999. Estimated Expiration Date: 
November 2, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 2, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesEngine surge prevention system Chuck for tool Patent #: 5340127 InventorsApplicationNo. 676387 filed on 11/02/1995US Classes:415/1, METHOD OF OPERATION60/795, Bleed415/17, Plural diverse condition responsive (e.g., temperature and pressure, speed and level, etc.)415/27Of relief valve in branched pump discharge lineExaminersPrimary: Look, Edward K.Assistant: Woo, Richard Attorney, Agent or FirmForeign Patent References
International ClassF01D 017/08AbstractA technique for controlling compressor stall and surge is disclosed. In a gas turbine engine, static pressure asymmetry is sensed at a plurality of locations along the circumference of the compressor inlet. Time rate of change of the mass flow in the compressor is also estimated using pressure measurements in the compressor. A signal processor uses these signals to modulate a compressor bleed valve responsive to the level of flow property asymmetry, the time rate of change of the annulus average flow to enhance operability of the compressor.Field of SearchMETHOD OF OPERATIONPlural diverse condition responsive (e.g., temperature and pressure, speed and level, etc.) Responsive to moving member developed fluid force, current or pressure Of relief valve in branched pump discharge line Of valve bypassing runner stage WITH INSPECTION, SIGNALING, INDICATING OR MEASURING MEANS Digital or programmed data processor Control of air/fuel ratio or fuel injection Artificial intelligence (e.g., fuzzy logic) | |
