Showing papers on "Afterburner published in 1978"

Incineration method and system

Abstract: The following disclosure teaches ways and means for incinerating organic wastes in a multiple hearth furnace equipped with an afterburner. In the furnace, the wastes are pyrolyzed in an oxygen deficient atmosphere which is regulated to only partially complete the oxidation of the organic substances which are pyrolyzed from the wastes. In the afterburner, air is introduced to complete the oxidation of the partially oxidized substances carried by gases and vapors from the furnace. The air supply to the afterburner is controlled so that, at temperatures above a predetermined temperature, the quantity of air introduced is increased with increasing temperatures and is decreased with decreasing temperatures. In other words, the pyrolyzing furnace is caused to operate with a deficiency of air over its operating range, while the afterburner is caused to operate with excess air and the amount of excess air supplied is used to control the operating temperature by quenching.

Supersonic cruise airplane and engine

Abstract: A supersonic airplane has a fuselage, a wing, a vertical stabilizer, a canard and a pair of turbine engines mounted in the fuselage. Each engine is of relatively simple design with a fixed inlet, a compressor and a turbine with a single drive shaft interconnecting the turbine and compressor. The engine can employ either fixed or variable exhaust nozzle geometry, depending on whether an afterburner is installed. The engine is point designed to provide maximum design thrust at a given intermediate throttle setting when the airplane is being propelled by the engine 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 at a substantially constant value equivalent to the corrected airflow at the predetermined supersonic cruise Mach number. The engine 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 to reduce the actual speed of the compressor and turbine.

Resonant or pulsating combustion heating apparatus

Abstract: A resonant or pulsating combustion heating apparatus of the present invention provides a high thermal efficiency heater with low concentrations of carbon monoxide and nitrogen oxides in the exhaust gas. The pulsation heater is constructed to provide an afterburner or late-combustion reactor in the pulsation tube. Combustion in the combustion chamber is of a relatively rich fuel/air mixture in which no nitrogen oxides are produced. The afterburning in the pulsation tube is carried out in the presence of excess air providing late combustion to remove carbon monoxide (CO).

Fuel distribution device

Abstract: The invention concerns a fuel distribution device in a high velocity gase flow. The device consists of two coaxial, toric injection manifolds placed in close proximity with respect to each other, pierced by small diameter uniformly distributed orifices and arranged to introduce fuel into the flow. The orifices in the manifold located downstream with respect to the direction of the flow of gases, are arranged on the face turned upstream of the manifold, in a circular row coaxial with it. It is the object of the invention to reduce the drag induced in the flow by the devices presently in use, while improving the distribution of the fuel; it finds particularly advantageous applications in the afterburner ducts of gas turbine engines.

Turbojet afterburner engine with two-position exhaust nozzle

Abstract: A turbojet afterburner engine has an expendable nozzle portion which can be jettisoned when the afterburner is placed in operation.

Variable thrust turbojet propulsion system - has curved flaps pivoted to end of afterburner tube

Abstract: The variable thrust turbojet propulsion arrangement includes jet flaps pivoted at the downstream end of the afterburner tube on cress shafts (2) to form radial outer walls (3, 4). The outer walls parts (3) are shaped to represent the exhaust cross section by-pass (6). The flap adjuster guides are fitted between the inner and outer wall sections. The outer wall has a curved surface (7) at the afterburner end to form a continuation of the by-pass inner wall (8) at all adjustment angles. The curved surface overlaps the afterburner end. The flap adjuster guides provide curved guide paths for the adjuster rollers (13). The rollers are fitted to pressure rods (14) moving in fixed guide paths (15) between the jet tube (1) and the curved section (7) and movable guide paths (16).

Exhaust cleaning system for IC engine - has two afterburners with separate air supplies for two groups of cylinders

Abstract: The exhausts from the cylinders of a four cylinder ic engine are joined together in pairs (5a, 5b) The common pipe from each pair leads to a three stage catalytic afterburner (10a, 10b) the discharges from which are joined together Secondary air is admitted upstream of the afterburners through two connections (23a, 23b) from the air inlet filter (2) Each connection contains a valve (21a, 21b) operated by the pressure in the exhaust pipe Secondary air is thus admitted into the afterburners in pulses to give a fuel air ratio which is alternately above and below the stoichiometric ratio This maintains the afterburning at optimum conditions over a wide range of engine loads

Catalytic exhaust gas afterburner of IC engine - has secondary air volume controlled to maintain stoichiometric conditions

Abstract: The exhaust pipe (5) of an internal combustion engine (1) contains a three stage catalytic afterburner (10a, 10b, 10c). The engine drives a fan (21) which delivers secondary air to the afterburner. A valve (40) in the secondary air pipe is operated by a membrane (41) between two chambers (42, 43). Solenoid valves (44, 45) admit air to and release it from these chambers in a timed sequence so that the air valve opens and shuts periodically. This oscillation controls the amount of air admitted to the afterburner. A relief valve (30) in the secondary air pipe is controlled from the engine suction manifold (4). The volume of secondary air is controlled to maintain a nearly stoichiometric mixture of air and gas in the three stages of the afterburner.

High efficiency exhaust afterburner - with thermal regeneration to improve heat recovery

Abstract: An appts. for processing industrial exhaust gases comprises a central high temp. chamber surround by >=3 equiangularly spaced heat exchange beds valved such that they each periodically act as outlet passage and then as regenerative inlets. Although installation cost may be 30% more than an afterburner with heat recovery, total annual operating savings may be 66%.