Showing papers on "Afterburner published in 1973"
Patent•
07 Nov 1973
TL;DR: In this paper, a plant in which there is a circulating gas flow, an afterburner is provided which is supplied with fuel from outside the system, and a part of the circulating gas is extracted and fed to the after-burner after passing in heat exchange relation with the burnt gas.
Abstract: In a plant in which there is a circulating gas flow, an afterburner is provided which is supplied with fuel from outside the system. A part of the circulating gas is extracted and fed to the afterburner after passing in heat exchange relation with a part of the burnt gas. The heat produced in the burner is fed to the plant either by feeding the burnt gas back to the plant or through heat exchange between the burnt gas and the gas in the plant.
50 citations
Patent•
27 Aug 1973
TL;DR: In this article, two sets of flaps are arranged one behind the other such that they can be moved jointly together to effect a thrust reversal for normal engine operation without afterburning.
Abstract: Apparatus for thrust reversal on a turbojet engine which includes two sets of deflector flaps which are movable into the path of exhaust gases to effect a thrust reversal. The two sets of flaps are arranged immediately one behind the other such that they can be moved jointly together to effect a thrust reversal for normal engine operation without afterburning. The flaps are also movable with respect to one another so that, with the most forward of the sets of flaps in an intermediate thrust reversal position so as to deflect flow from the thrust nozzle around the outer portions thereof, the second set of flaps arranged rearwardly of the first set can be pivoted into position for deflecting the central area of exhaust flow at a position spaced downstream of the first set of flaps. In this manner, the first set of flaps effectively deflects the cooler bypass air flow so as to create an insulating cushion for adjacent engine parts, while the second set of flaps effects a thrust reversal from the hot central exhaust gas stream. By spacing the first and second set of flaps from one another for afterburner operation, openings between the two sets of flaps in the lateral direction effect an increase in the nozzle exit discharge area to accommodate the augmented gas flow due to afterburning.
22 citations
Patent•
02 Jul 1973
TL;DR: In this paper, a working line trim unit of limited authority is provided for making minor adjustments to the nozzle discharge area during steady state operation, while the degree of after-burning signal from the nozzle to the fuel control unit is held constant.
Abstract: Aero gas turbine engine equipped with an afterburner and a final nozzle having a variable discharge area in which a direct mechanical or electrical connection exists between the nozzle actuating mechanism and the afterburner fuel control unit for controlling the degree of after-burning as a function of the actual nozzle discharge area during transient engine operating conditions with the engine throttle moving in the after-burning range above a predetermined speed. A working line trim unit of limited authority is provided for making minor adjustments to the nozzle discharge area during steady state operation, while the degree of afterburning signal from the nozzle to the fuel control unit is held constant. This working line trim unit is locked out of the control cycle during transient operating conditions so as to assure the direct control of the degree of afterburning as a function of the actual discharge area during these transient conditions.
6 citations
Patent•
27 Feb 1973
TL;DR: In this paper, an afterburner is used in the engine to determine the gross thrust of a jet engine by measuring various internal pressures, including measurement of total pressure at the nozzle entrance.
Abstract: Apparatus is known for determining gross thrust in jet engines by measuring various internal pressures, including measurement of total pressure at the nozzle entrance by means of an immersed probe. The immersed probe has a very short life when an afterburner is used in the engine. The apparatus for the invention is able to determine total pressure at the nozzle entrance, without an immersed probe, from the total pressure in the diffuser and the static pressure at the nozzle entrance. Another embodiment makes use of an additional static pressure in the flame-holder region. Also, the invention is for determining the gross thrust of an engine and it distinguishes between an engine with a nozzle operating in a choked condition and an unchoked condition.
3 citations
Patent•
02 Aug 1973
TL;DR: In this paper, the exhaust gases of the engine used to drive the generator for a high frequency induction coil are used to heat a continuous preheating furnace for the workpiece tubes.
Abstract: The metal components are heated to elevated temps. a process where the exhaust gases of the engine used to drive the generator for a high frequency induction coil are used to heat a continuous preheating furnace for the workpiece tubes. A gas turbine is pref. used to drive the generator. Its exhaust gases are burnt in an afterburner with further fuel and O2, which gases are passed into a furnace. The system has high fuel efficiency.
1 citations
01 Dec 1973
TL;DR: In this article, a brief testing program was undertaken to determine if spontaneous ignition and stable combustion could be obtained in a jet engine afterburning operating with an inlet temperature of 1240 K and a pressure of 1 atmosphere with ASTM Jet-A fuel.
Abstract: A brief testing program was undertaken to determine if spontaneous ignition and stable combustion could be obtained in a jet engine afterburning operating with an inlet temperature of 1240 K and a pressure of 1 atmosphere with ASTM Jet-A fuel. Spontaneous ignition with 100-percent combustion efficiency and stable burning was obtained using water-cooled fuel spraybars as flameholders.
1 citations