Showing papers on "Afterburner published in 1980"

Mixed flow augmentor incorporating a fuel/air tube

Abstract: In a turbofan jet engine, having a circumferentially rotatable mixer segment capable of orienting the afterburner ignitors and flameholders into the path of either the exhaust gases or bypass air, a fuel-air transfer apparatus for capturing, transporting and the releasing of an enriched fuel-air concentration from the fuel spray bars, on the stationary structure of the jet engine, to the afterburner ignitors and flameholders rigidly attached at the rear of the rotatable segment of the mixer. The enriched fuel-air mixture is transported between a location of reliable fuel availability, through a region of highly turbulent gas flow and is thereafter released while still in an enriched concentration immediately upstream of the ignitors and flameholders, facilitating ignition and sustained operation of the afterburner. The transfer of the fuel-air mixture with the exhaust gases in a confining apparatus precludes the necessity for transferring fuel, by flexible attachment or other means, between the stationary jet engine structure and the rotatable segment of the mixer, upon which the ignitors and flameholders are mounted, while insuring an appropriate fuel-air mixture for ignition and operation of the afterburner.

Burner control system

Abstract: A control system for multiple burners or heaters in an afterburner section of a metal scrap dryer is provided. The control system provides for cascade and sequential control including selective and sequential ignition as well as selective and sequential deenergization of the burners or heaters.

Afterburner for combustion of starved-air combustor fuel gas containing suspended solid fuel and fly ash

Abstract: An afterburner for use as a secondary combustion chamber in a starved-air combustor system to further combust any combustible material in the combustion gas and entrained solid particle material discharge from the combustion chamber of the starved-air combustor system. The afterburner is lined with refractory and includes a diverter plate positioned transversely to the incoming flow of combustion gases. The afterburner is divided into a plurality of reaction zones, each of which has an associated reaction air supply. The diverter plate imparts a cyclonic flow to the combustion gas which is enhanced by air injected in the combustion zones. The temperature of the gas discharged from the afterburner is monitored and the flow of reaction air controlled responsive to changes in discharge gas temperature from a predetermined temperature.

Supersonic airplane engine configuration.

Abstract: A supersonic airplane has a fuselage (20), wings (22) and (24), a vertical stabilizer (34 - 38), a canard (30) and (32) and a pair of turbine engines (44, 46 or 70) mounted in the fuselage (20). Each engine (44, 46 or 70) is of relatively simple de-sign with a fixed inlet, a compressor (80 - 82) and a turbine (84) with a single drive shaft (76) interconnecting the turbine (84) and compressor (80). The engine (44, 46 or 70) can employ either fixed or variable exhaust nozzle geometry (75) depending on whether an afterburner is installed. The engine (70) is point designed to provide maximum design thrust at a given intermediate throttle setting when the airplane is being propelled by the engine (70) at a predetermined supersonic cruise Mach number. Maximum allowable thrust at speeds below the predetermined cruise Mach number is achieved without variable geometry air inlets by maintaining the corrected airflow through the engine (70) at a substantially constant value equivalent to the corrected airflow at the predetermined supersonic cruise Mach number. The engine (70) corrected airflow is maintained at a constant value by monitoring an engine operating parameter indicative of corrected airflow and adjusting the fuel flow to the engine (70) to reduce the actual speed of the compressor (80 - 82) and turbine (84).

Waste gas surface afterburner - has ignition gas pipe and igniter inside combustion gas pipe

Abstract: The surface burner is for the direct gas-heated afterburning of incompletely burnt waste gas, having a housing in the path of the latter with perforated mixing plates inclined in the flow direction. The combustion and ignition gases and air are supplied via pipes from outside the waste gas pipe, as is the ignition energy. The ignition gas pipe and igniter or ignition wire are mounted inside the combustion gas pipe (10), which extends to the burner housing (6) from the rear in the waste gas flow direction and is joined to the rear housing wall (9).