RU2287112C1 - Tubular-type combustion chamber of gas-turbine engine - Google Patents

Abstract

FIELD: combustion chambers.

SUBSTANCE: the tubular-type combustion chamber of a gas-turbine engine has a cavity formed by the body accommodating a flame tube having a swirler, combustion zone, mixing zone and a spark plug. The tubular-type combustion chamber is made for burning of a hydrogen-oxygen mixture. The cavity formed by the body is sealed preventing the ingress of the hydrogen-oxygen mixture to it, and is provided with an injector made for control of the supply of liquid fuel cooling the flame tube and then of the combustion products. The flame tube is made for a detachable and sealed fastening to the compressor outlet connection.

EFFECT: enhanced economical and ecological efficiency of the tubular-type combustion chamber.

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Description

The invention relates to the field of engine building, namely to combustion chambers, and can be used in gas turbine engines for various purposes.

A well-known combustion chamber of a jet engine, which runs on petroleum fuel mixed with air, contains a housing in the cavity of which a flame tube is installed with a nozzle, a combustion stabilizer, a combustion zone and a mixing zone (A.S. USSR, F 23 R 3 / 14, 01/10/1980) [1].

A disadvantage of the known combustion chamber is its operation on expensive petroleum fuels and environmental pollution by toxic exhaust.

Closest to the proposed invention is a tubular combustion chamber of a gas turbine engine, which contains a cavity formed by a housing in which there is a flame tube having a swirl, a combustion zone, a mixing zone, a nozzle for supplying oil fuel and a spark plug (G. Skubachevsky, Aviation gas turbine engines. - 5th edition. - M.: Mechanical Engineering. 1981, pp. 397-400, Fig. 9.19) [2].

The disadvantage of the closest analogue is the high cost of the fuel used, environmental pollution by toxic emissions and its inappropriateness for burning a hydrogen-oxygen mixture.

The technical problem solved by the invention is to increase the economic and environmental efficiency of the combustion chamber of a gas turbine engine.

The problem is solved in that in a tubular combustion chamber of a gas turbine engine containing a cavity formed by a housing in which there is a flame tube having a swirl, for example a blade, combustion zone, mixing zone and spark plug, according to the invention, the combustion chamber is capable of burning hydrogen oxygen mixture, where the cavity formed by the housing is sealed from the ingress of a hydrogen-oxygen mixture and is equipped with a nozzle made with the possibility of a controlled supply of oxygen to it azhdayuschey flame tube and then combustion of liquid fuels, such as water. The flame tube is made with the possibility of its detachable and hermetic fastening to the compressor outlet pipe, for example, with bolts.

The invention is shown in the drawings, where

Figure 1 - schematic section of a combustion chamber,

Figure 2 is a view along arrow A in figure 1.

An example of the implementation of the proposed solution.

The tubular combustion chamber of a gas turbine engine contains a cavity 1 sealed from a hydrogen-oxygen mixture (FIGS. 1-2), formed by a housing 2, which, for example, is bolted to the pipes of the compressor 3 and turbine 4. The flame tube 5 is detachable and hermetically sealed, for example, flange 6, bolted to the compressor outlet pipe, has a swirl 7, for example, a scapula, a combustion zone 8, a mixing zone with holes 9 and a spark plug 10, its temperature extensions extend towards the turbine. The sealed cavity is equipped with a nozzle 11, controlled, for example, by a control unit, for supplying a cooling heat pipe to it and then products of fuel combustion in the mixing zone of a liquid, for example, water.

The tubular combustion chamber of a gas turbine engine operates as follows.

Before starting, they turn on the spark plug 10 and, for example, a blade swirler 7, which turbulizes the flow, from the compressor through the outlet pipe 3 to the flame tube 5, a hydrogen-oxygen mixture is supplied. In the combustion zone 8, the spark plug 10 ignites the gas mixture ready for combustion. The swirler 7, due to the pressure of the gas stream in front of it, the speed of the gas stream through it and its low intrinsic temperature, cuts off the combustion flame of the gas mixture during reverse impacts, which protects the compressor from destruction. Through the nozzle 11 into the cavity 1 of the housing 2 sealed from the ingress of hydrogen-oxygen mixture, under the control of, for example, a control unit, a liquid is supplied, for example water, which cools the walls of the flame tube 5 and then, in the form of steam, through the openings 9 enters the zone mixing and cools there the products of combustion of fuel to a predetermined value. When this temperature expansion of the flame tube 5 occurs in the direction of the pipe 4 of the turbine.

The proposed combustion chamber in operation is highly economical and absolutely environmentally friendly, it will find wide application in gas turbine engines for various purposes.

Claims (1)

A tubular combustion chamber of a gas turbine engine containing a cavity formed by a housing in which there is a flame tube having a swirl, a combustion zone, a mixing zone and a spark plug, characterized in that it is capable of burning a hydrogen-oxygen mixture, where the cavity formed by the housing is sealed from the ingress of a hydrogen-oxygen mixture and is equipped with a nozzle made with the possibility of a controlled supply to it cooling the heat pipe and then the products of combustion of liquid fuel, heat t the pipe is made with the possibility of its detachable and hermetic fastening to the compressor outlet pipe.

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