Operating Condition and Geometry Effects on Low-frequency Afterburner Combustion Instability in a Turbofan at AltitudeNational Aeronautics and Space Administration, Scientific and Technical Information Branch, 1979 - Airplanes - 28 pages |
Common terms and phrases
afterburner combustion instability Afterburner fuel flow Afterburner fuel-air ratio afterburner inlet total afterburner zone air ratio axial location axial-flow bellmouth burner bypass ratio centimeters Combustion instability amplitude Combustion instability frequency combustion section compressor condition 11 core chute core fuel flow core fuel-air ratio core heater decreased fan airflow fan chute fan fuel flow fan fuel-air ratio fan stream fan to core flameholders and fuel flow was increased flowmeter fuel injection Fuel spray bars fuel vaporization rates fuel-air ratio increased higher turbine outlet holder increased the rumble inlet total pressure Labyrinth seal load cells Mach number meters 38 Mixer flame mixer flameholder II overall fuel-air ratio P-3 afterburner peak to peak piloting recirculation zone rumble amplitude increased rumble frequency rumble intensity rumble-free operation severe rumble shown in figure simulated flight conditions spray bar assemblies suppress rumble thrust bed tion turbine outlet temperature V-gutter vaporization length Zone 4 Zone zone fuel distributions