Journal of the Korean Society of Combustion (한국연소학회지)
- Volume 3 Issue 1
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- Pages.59-69
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- 1998
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- 1226-0959(pISSN)
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- 2466-2089(eISSN)
Control of Combustion Instabilities in a Gas Turbine Combustors Through Secondary Fuel Injection
가스터빈 연소기내 2차연료분사에 의한 연소 불안정성의 제어
- Jeon, C.H. ;
- Santavicca, Domenic A. (Pennsylvania State University)
- 전충환 (부산대학교 기계공학부) ;
- Published : 1998.06.30
Abstract
The results of study on the active control of naturally occurring combustion oscillations with a single dominant frequency in an atmospheric dump combustor are presented. Control was achieved by an oscillatory infection of secondary fuel at the dump plane. A high speed solenoid valve with a maximum frequency of 250Hz was used as the actuator and a sound level meter, located at the combustor exit, measured the pressure fluctuations which served as the feedback signal for the control loop. Instability characteristics were mapped over a range of mean mixing section velocities from 6.7 m/s-9.3 m/s and with three mixing conditions. Different fuel/air mixing conditions were investigated by introducing varying percentages of primary fuel at two locations, one at the entrance to the mixing section and one 6 mixing tube diameters upstream of the dump plane. Control studies were conducted at a mean velocity of 9.3 m/s, with an air temperature of
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