Apparatus and method of predicting aerodynamic and aeromechanical instabilities in turbofan engines
US6010303A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1998 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Aug 5, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2270/102
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.