[특허]Combustion system for a gas turbine engine

Combustion system for a gas turbine engine 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02C-007/045
출원번호	US-0665154 (1984-10-26)
우선권정보	GB-19830029218 (1983-11-02)
발명자 / 주소	Ffowcs Williams, John E. Dines, Philip J. Heckl, Maria A.
대리인 / 주소	Cushman, Darby & Cushman
인용정보	피인용 횟수 : 33 인용 특허 : 0

초록 ▼

A combustion system for gas turbine engines incorporates a feedback loop which provides positive damping for the control of unstable combustion, particularly buzz in reheat systems, but also at least some cases of combustion rumble in main combustion systems. The feedback loop includes a sensor, a control unit and an exciter. The control unit monitors the strength of the sensor signal, which senses a cyclically varying parameter of the unstable combustion process, and adaptively varies the amount by which the signal is phase-shifted and amplified in order to obtain a sensor signal of minimum strength, this being achieved by controlling the exciter in accordance with the phase-shifted amplified signal to change the boundary conditions of the combustion process and thereby eliminate the unstable combustion.

대표청구항 ▼

1. A combustion system for a gas turbine engine, the combustion system incorporating a feedback loop for the control of an unstable combustion process in the combustion system, the feedback loop including: sensor means for sensing a cyclically varying parameter of the unstable combustion process and producing a signal corresponding thereto; control means for phase-shifting and amplifying the signal from the sensor means; and exciter means for changing the boundary conditions of the combustion process in accordance with the phase-shifted amplified signal; said control means including adaptive means for monitoring the strength of the sensor signal and varying the amount by which the signal is phase-shifted and amplified to obtain a sensor signal of minimum strength, whereby said unstable combustion is substantially eliminated. 2. A combustion system according to claim 1 in which the control means comprises: low pass filter means adapted to pass a predetermined range of frequencies of the cyclically varying parameter of the unstable combustion process; variable phase shifter means for phase-shifting the signal from the sensor means by a variable amount; a variable gain amplifier for amplifying the phase-shifted signal by a variable amount; and a supervisory unit for monitoring the strength of the signal from the low pass filter and altering the gain of the variable gain amplifier and the phase change produced by the variable phase shifter until the signal from the low pass filter is at a minimum. 3. A combustion system according to claim 1 in which the sensor means comprises vibration transducer means arranged to detect vibration in the combustion system due to the unstable process. 4. A combustion system according to claim 1 in which the sensor means comprises pressure transducer means arranged to detect pressure fluctuations in the combustion system due to the unstable combustion process. 5. A combustion system according to claim 4 in which the pressure transducer means is a microphone arranged to detect fluctuations in sound pressure level. 6. A combustion system according to claim 1 in which the sensor means comprises opto-electronic transducer means arranged to detect variable light emissions from the unstable combustion process. 7. A combustion system according to claim 1 in which the exciter means comprises means for modulating the flow of a fluid participating in the combustion process. 8. A combustion system according to claim 1 in which the exciter means comprises means for producing pressure fluctuations in a fluid participating in the combustion process. 9. A combustion system according to claim 1, the combustion system having fuel supply means incorporating the exciter means, the exciter means comprising a reciprocatory element adapted to superimpose pressure fluctuations on the fuel supply. 10. A combustion system according to claim 9, in which the reciprocatory element comprises an electromagnetically driven diaphrgm. 11. A combustion system according to claim 8 in which the exciter means comprises a loudspeaker for producing fluctuations in sound pressure level in and near the combustion process. 12. A combustion system according to claim 1, the combustion system being a reheat combustor system.

이 특허를 인용한 특허 (33)

Pandalai Raghavan P. (Cincinnati OH) Carter Bruce A. (West Chester OH) Hehmann Horst W. W. (Cincinnati OH), Acoustic damper for a gas turbine engine combustor.
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Acton Elizabeth (Cambridge GB2) Cargill Alexander M. (Derby GB2) Ross Colin F. (Cambridge GB2) Eatwell Graham P. (Cambridge GB2), Active control of unsteady motion phenomena in turbomachinery.
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Acton Elizabeth (Cambridge GB2) Cargill Alexander M. (Derby GB2) Ross Colin F. (Cambridge GB2) Eatwell Graham P. (Cambridge GB2), Active control of unsteady motion phenomena in turbomachinery.
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Ryan, William Richard; Berksoy, Sanem, Automatic combustion control for a gas turbine.
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Ryan, William Richard; Berksoy, Sanem, Automatic combustion control for a gas turbine.
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Gleeson, Eamon P.; Smith, Walter John; Naumiec, Robert John; Han, Fei, Dynamic pressure probe holder and method of obtaining a dynamic pressure signal.
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Kramer, Stephen K., Gas turbine engine optical system.
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Miles Barry D. (Bristol GB2), Gas turbine fuel control system.
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Parker, David; Ryan, William Richard, Gas turbine with flexible combustion sensor connection.
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Gleeson, Eamon P., Kit and method for setting probe depth.
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Daniel Robert Tegel ; Gerald P. Hunt ; Jack Edward Lawton ; Robert Edward Malo, Measurement method for detecting and quantifying combustor dynamic pressures.
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Paschereit, Christian Oliver; Weisenstein, Wolfgang; Gutmark, Ephraim; Polifke, Wolfgang, Method and apparatus for minimizing thermoacoustic vibrations in gas-turbine combustion chambers.
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Noppel, Frank G.; Singh, Riti; Taylor, Mark D., Method and apparatus for suppressing aeroengine contrails.
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Wilson, Kenneth J.; Yu, Kenneth H.; Parr, Timothy; Schadow, Klaus C., Method and device for modulation of a flame.
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Wilson, Kenneth J.; Yu, Kenneth H.; Parr, Timothy; Schadow, Klaus C., Method and device for modulation of a flame.
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Wilson, Kenneth J.; Yu, Kenneth H.; Parr, Timothy; Schadow, Klaus C., Method and device for modulation of a flame.
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Ephraim Gutmark ; Christian Oliver Paschereit CH; Wolfgang Weisenstein CH, Method for minimizing thermoacoustic oscillations in gas turbine combustion chambers.
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Gutmark, Ephraim; Paschereit, Christian Oliver; Weisenstein, Wolfgang, Method of and appliance for suppressing flow eddies within a turbomachine.
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Olde Scheper, Tjeerd Victor Siebe Maria; Carnell, Andrew Robert, Method of controlling a dynamic physical system that exhibits a chaotic behaviour.
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Ephraim Gutmark ; Christian Oliver Paschereit CH; Wolfgang Weisenstein CH, Method of controlling thermoacoustic vibrations in a combustion system, and combustion system.
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Catharine, Douglas Ancona; Gleeson, Eamon; De, Soumen, Methods and apparatus for monitoring gas turbine combustion dynamics.
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Neumeier Yedidia ; Zinn Ben T., Methods, apparatus and systems for real time identification and control modes of oscillation.
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Neumeier Yedidia ; Zinn Ben T., Methods, apparatus and systems for real time identification and control of modes of oscillation.
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Tuken Taner (Columbus IN), Model predictive control for HPI closed-loop fuel pressure control system.
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Dunbar, Jr.,Donal S., Retractable afterburner for jet engine.
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Brough Anthony D. (Hamilton OH), System and method for actively controlling pressure pulses in a gas turbine engine combustor.
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Hatcher, Jr., Clifford; Hatley, Richard; Genc, Yakup; Ruhge, Forrest R., System and method for on line monitoring within a gas turbine combustor section.
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McConkey, Joshua S., System for remote vibration detection on combustor basket and transition in gas turbines.
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Pearce,Kevin P, Turbine engine pulsed fuel injection utilizing stagger injector operation.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Combustion system for a gas turbine engine 원문보기

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Combustion system for a gas turbine engine 원문보기

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