Showing papers on "Afterburner published in 1986"

Fuel regression and flame stabilization studies of solid-fuel ramjets

Abstract: An experimental investigation of solid-fuel ramjets (SFRJ) has been performed in order to determine the fuel regression behavior and flame stability limits. In order to investigate the fuel regression for various flight speeds and altitudes, chamber pressure, air mass flux, and inlet temperature have been varied over a wide range. The flame holding studies with a sudden-expansion dump combustor were aimed at minimizing the ratios of fuel port to nozzle throat area and fuel port to injector area. The standard fuel in this study was polyethylene (PE), whereas hydroxylterminated polybutadiene (HTPB) fuel was also Investigated in a limited number of tests.

Afterburner fuel injection system

Abstract: An afterburner fuel injection system is disclosed which utilizes a plurality of individual fuel injectors displayed in a radial array around the periphery of a turbojet afterburner. An atomizing chamber is associated with each fuel injection conduit to achieve a homogeneous atomization of the fuel with the exhaust gases passing through the afterburner. Each fuel injector is individually connected to a fuel supply source and a source of purging air to minimize the delay in afterburner ignition and to prevent coking of the injector nozzles.

Power generation system in fuel cell

Abstract: A power generation system in a fuel cell having an air preheater for preheating air for a fuel cell reaction which will be fed to an afterburner of a high-temperature solid electrolyte type fuel cell, characterized by disposing, between the air preheater and the afterburner, a combustor for performing an additional combustion after the temperature of the air for the reaction has been elevated by the air preheater.

Temperature control system for pyrolysis furnace

Abstract: A batch-type pyrolysis furnace fired by a main gas burner and an afterburner, is effectively safeguarded from explosions and runaway fires due to an undue build-up of flammable vapors within its main chamber, by the simple expedient of maintaining a fire under controlled temperature conditions in the main chamber This is done by a dual-stage control system requiring three thermocouples, one (first) in the main chamber, a second in the exhaust stack downstream of the afterburner, and a third upstream of the afterburner in the vent passage ("throat") connecting the main chamber with the afterburner chamber The first thermocouple in the main chamber senses the ambient, essentially instantaneous temperature at that location The effectiveness of the control system, in large measure, derives from the unexpected difference in temperatures sensed by the first and third thermocouples

Installation for the control of the fuel supply to the afterburner of a bypass gas turbine jet propulsion unit

Abstract: An installation for the control of the fuel supply to the afterburner of a bypass jet propulsion unit which permits an individual modulation of the fuel flows to the different burner systems, namely, the ignition burner, the main burner in the inner flow and the burner in the bypass flow. For this purpose, separate fuel pumps are coordinated to the inner flow and the bypass flow. The two fuel systems of the inner flow are thereby so linked from a shifting and regulating point of view that they can be individually modulated without mutual reaction. The fuel system of the bypass flow is independent of the fuel system of the inner flow so that the modulation thereof also has no reaction on the fuel system of the inner flow. The installation additionally enables a rapid prefilling of the injection lines in that the injection lines of the ignition burner are prefilled by way of the metering device for the entire fuel quantity of the inner flow and the injection lines of the main burner in the inner flow are prefilled by way of the metering device for the fuel of the bypass flow.

Afterburner chamber behind a combustion furnace of a combustion installation for chemical waste

Abstract: The invention relates to an afterburner chamber behind a combustion furnace of a combustion installation for chemical waste, etc., with burners arranged in the side walls of the chamber and directed into the inside of the chamber for injecting liquid, pasty or gaseous waste through a nozzle. It is characterised in that the burners (10) are concentrated essentially in the lower half of the chamber (2) adjacent to the discharge of the gases from the combustion furnace (6) into the chamber (1) and the slag discharge (9) and are directed downward at an angle of inclination of 30 - 60@ to the longitudinal axis (L) of the chamber.

Denitrating method for exhaust gas of combustion furnace

Abstract: PURPOSE:To maintain the exhaust gas temperature at an optimum denitrating temperature by mounting an afterburner in the vicinity of the position for pouring a reducing agent and by igniting the extinguishing the afterburner in accordance with the rise and fall of the exhaust gas temperature. CONSTITUTION:A reducing agent-pouring pipe 7 is mounted in the vicinity of the exhaust gas inlet of a denitrating chamber 3 and the reducing agent is poured into the exhaust gas from a nozzle 8. The exhaust gas temperature is detected by a thermocouple 9 placed in the vicinity of the pouring pipe 7 and a temperature signal 10 is outputted and sent to the input of a temperature comparator 11. The exhaust gas temperature is compared with the optimum denitrating temperature and a signal 13 of the temperature difference is outputted via an afterburner load computing element 14. A signal 15 is outputted to an burner-regulator 16 to adjust the combustion of the afterburner 17.

Numerical study of combustion processes in afterburners

Abstract: Mathematical models and numerical methods are presented for computer modeling of aeroengine afterburners. A computer code GEMCHIP is described briefly. The algorithms SIMPLER, for gas flow predictions, and DROPLET, for droplet flow calculations, are incorporated in this code. The block correction technique is adopted to facilitate convergence. The method of handling irregular shapes of combustors and flameholders is described. The predicted results for a low-bypass-ratio turbofan afterburner in the cases of gaseous combustion and multiphase spray combustion are provided and analyzed, and engineering guides for afterburner optimization are presented.

Exhaust gas processing device for internal-combustion engine

Abstract: PURPOSE:To reduce detrimental components by circulating gas containing detrimental components which has been separated in an exhaust gas separating muffler to an afterburner by a heat resisting air pump and further sending air into the afterburner by a compressor. CONSTITUTION:Exhaust gas A which has been taken in from a pre-exhaust gas pipe 8 is caused to be swirling current in an exhaust gas separating muffler 1, and is separated into gas containing detrimental components and that not containing this. Gas containing detrimental components is circulated to an afterburner 2 by a heat resisting air pump 4. Further, air is mixed into the gas containing detrimental components by a compressor 5. This mixed gas is burned in the afterburner 2 while being mixed with the exhaust gas A.