Active Combustion Instability Control With Spinning Valve Actuator

摘要: Active combustion control has been accomplished in many laboratory and real-world systems by fuel modulation as the input. The is commonly achieved using reciprocating flow devices. These demonstrations have successful because instabilities at relatively low frequencies (∼200 Hz) or scale of demonstration small enough to require very levels modulation. A number gas turbine engines involve higher (200–500 attenuation requires large fractions engine rate (hundreds pounds per hour). spinning drum valve was built modulate for these applications. Tests showed that this device provided more than 30% up 800 Hz liquid flows greater 400 lbm/hr. This paper describes performance bench tests, open-loop forcing closed-loop instability tests. closed loop tests were done on a single-nozzle combustor rig which exhibited limit-cycling frequency ∼280 with an amplitude ∼7 psi. It also encounters 575 under different set rig, though active not investigated so far. test results show could be effectively used control, algorithms need developed will deal account actuator phase drift/error.© 2002 ASME