RU2196906C2 - Combustion chamber of gas turbine engine - Google Patents

Abstract

FIELD: mechanical; engineering; engine. SUBSTANCE: combustion chamber of gas turbine engine with constant fuel combustion volume has housing, flue installed in housing and made in form of rotating spool with cut forming working medium inlet and outlet ports, and inlet and outlet channel device. Axis of outlet channel device is displaced relative to center of rotation of spool. Nozzle installed in port is displaced to edge of cut in direction of spool rotation. At least one additional channel can be formed in outlet device. EFFECT: increased efficiency of combustion chamber. 2 cl, 1 dwg

Description

 The invention relates to gas turbine engines (GTE) and, in particular, to GTE combustion chambers with fuel combustion at a constant volume.

 Known combustion chamber of a gas turbine engine with a constant volume of fuel combustion, containing a housing, a heat pipe installed in it, at the entrance to which there is a nozzle, and at the output of the receiver and a rotating spool [1].

 Also known is a GTE combustion chamber with a constant volume of fuel combustion, comprising a housing, a heat pipe installed in it, made in the form of a rotating spool having a slice forming a window for the input and output of the working fluid, input and output channel devices. The axis of the output device is offset from the center of rotation of the spool. The gas is ejected from the combustion chamber through an opening with an automatic valve made in the chamber wall into the adjacent combustion chamber and then to the output device [2].

 The location of the holes in the wall of the combustion chamber does not provide the maximum shoulder between the direction of the resulting reactive force and the center of rotation of the spool and, accordingly, the maximum moment of rotation, which, in turn, does not provide the maximum efficiency of the combustion chamber.

 The invention solves the problem of increasing the shoulder between the direction of the resulting reactive force and the center of rotation of the spool, which leads to an increase in the efficiency of the combustion chamber.

 To achieve this technical result, the combustion chamber of a gas turbine engine with a constant volume of fuel combustion contains a housing in which a heat pipe is installed, made in the form of a rotating spool having a slice. The slice forms a window for entry and exit of the working fluid. The camera is equipped with input and output channel devices.

 New in this solution is that a nozzle is installed in the window, which is offset to the edge of the cut in the direction of rotation of the valve.

 In addition, at least one other channel may be formed in the output of the combustion chamber.

 The location of the nozzle in the spool window allows you to get the maximum shoulder between the direction of the resulting reactive force and the center of rotation of the spool and thereby have a maximum moment on the spool. The presence of several channels in the output device allows for an uninterrupted flow of gas in it. All this leads to an increase in the efficiency of the combustion chamber.

 The drawing shows the proposed combustion chamber.

 The combustion chamber contains a housing 1 and a heat pipe installed therein, made in the form of a rotating spherical spool 2, with a slice 3, forming a window 4 for the entrance and exit of the working fluid. The combustion chamber has a channel input 5 and output 6 device. The axis 7 of the output device 6 is offset relative to the center of rotation 8 of the spool 2. In the output device 6, a baffle 9 is installed, dividing it into two channels 10. A nozzle 11 is mounted on slice 3 of the spool 2, offset to the edge 12 of the slice 3 in the direction of rotation of the spool 2. On housing 1 has a fuel nozzle 13 and an igniter 14. The seal between the spool 2 and the housing 1 is labyrinth.

 When the combustion chamber, when the window 4 is facing the input device 5, the air enters the cavity of the valve 2. Then, when the valve 2 is rotated, the window 4 is closed by the housing 1 with the formation of a closed volume and fuel is injected by the nozzle 13. The resulting air-fuel mixture ignites from the igniter 14 and burns at a constant volume. Then, when the rotation of the spool 2, the window 4 communicates with the output device 6, the expiration of the combustion products. Because Since the resultant reactive force vector from the outgoing gases is shifted relative to the center of rotation, a moment is created on the spool 2, which ensures its rotation.

 The combustion chamber is purged when, when the spool 2 is rotated, window 4 is simultaneously in communication with input 5 and output 6 devices.

 This embodiment of the combustion chamber allows you to organize the drive of the spool itself, as well as auxiliary units. It is possible to use this camera as a simplified gas turbine engine of low power, for example, as a turbostarter.

Sources of information
1. British patent 1439255, publ. 1976 - an analogue.

 2. Copyright Certificate 31718, claimed 05/30/1931

Claims (2)

 1. The combustion chamber of a gas turbine engine with a constant volume of fuel combustion, comprising a housing, a heat pipe installed in it, made in the form of a rotating spool having a slice forming a window for the input and output of the working fluid, input and output channel devices, the axis of the latter being offset relative to the center of rotation of the valve, characterized in that the nozzle is installed in the window, offset to the edge of the slice in the direction of rotation of the valve.  2. The combustion chamber according to claim 1, characterized in that at least one more channel is formed in the output device.