Acceleration control with duct pressure loss compensation
US5022224A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1989 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | May 30, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2270/044
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Control logic means to compensate for fan bypass duct pressure losses in a system that controls the acceleration mode for a twin spool gas turbine engine so as to allow the engine to accelerate rapidly with adequate stall margin by simulating a compressor stall limit. The stall limit is attained by generating a limiting ratio of burner pressure and another engine pressure as a function of corrected compressor rotor speed assuming that the stall margin is independent of compressor bleed, power extraction and degradation of engine efficiency. Compensation is by generating an engine pressure ratio signal as a function of corrected low pressure compressor rotor speed and using the difference between the signal and actual engine pressure ratio for modifying the simulated compressor stall limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.