Chi-Ming Lee Chief of Combustion Branch NASA Glenn Research ...

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Combustion Instability Control Strategy Objective: Suppress combustion thermo-acoustic instabilities when they occur Φ’ + + Fuel-air Mixture system Combustion Process Actuator Closed-Loop Self-Excited System Controller Combustor Acoustics Natural feed-back process Artificial control process Sensor P’ 18
Long Term Goal for Active Combustion Control • Improve fundamental understanding of the combustor processes in order to… • More effectively integrate multi-point combustor design, controls, sensor, and actuator technologies to provide… – An intelligent fuel/air management system with temporal and spatial fuel modulation for • Instability avoidance/suppression – Thermoacoustics, blowout • Pattern factor control • Emissions minimization to enable… � Combustors with extremely low emissions throughout the engine operating envelope 19
Page 1 and 2: Chi-Ming Lee Chief of Combustion Br
Page 3 and 4: NOx emissions vs. the Overall Press
Page 5 and 6: Flametube Combustor Emissions Reduc
Page 7 and 8: Fuel Flexible/Low Emissions Combust
Page 9 and 10: 75% Nox Reduction Injector Developm
Page 11 and 12: Time--> C 8 C 9 C 10 C 11 F-T Fuel
Page 13 and 14: JP8, 50-50 Blend, and FT-2 Comparis
Page 15 and 16: ASCR Plenum Design and Fabrication
Page 17: Ultra-Lean-Burning Combustors Are M
Page 21 and 22: Active Combustion Control Combustio
Page 23 and 24: SiC Electronics Status • Building
Page 25 and 26: SiC Pressure Sensor Status • The
Page 27 and 28: High Temperature Combustor Liner Ch
Page 29 and 30: ERA CMC LINER - Subtasks 1. Liner m
Page 31 and 32: ERA CMC Liner Material Testing- Env
Page 33 and 34: High Temperature Piezoelectric Mate

Chi-Ming Lee Chief of Combustion Branch NASA Glenn Research ...

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