RU1800228C - Pneumatic nozzle of sectional combustion chamber of gas- turbine plant - Google Patents

Abstract

Usage: in the field of power engineering and energy for sectional combustion chambers of gas turbine plants. The inventive pneumatic nozzle contains a pipe 1 for supplying fuel, communicated by the nozzles 2 with the mixing chamber 3, mounted in the housing 4 with the formation of a channel 5 for supplying a spray connected by tangential holes 6 to the mixing chamber 3, in the fuel supply pipe 1, at least one diaphragm 7 with holes 8 is installed in front of the nozzles 2, and the ratio of the area of the passage sections of the holes 8 of the diaphragm 7 to the area of the passage sections of the nozzles 2 is 0.3-0.5. The diaphragm 8 increases the inertia by eye fuel and eliminates the effect of pressure fluctuations in the firing zone of the chamber due to nonstationary combustion process .2 yl. fe

Description

The invention relates to power engineering and power engineering, in particular to pneumatic nozzles of gas turbine sectional combustion chambers.

The aim of the invention is to increase the reliability of a sectional gas turbine combustion chamber by eliminating pulsations and increasing the inertia of the fuel flow.

In FIG. 1 shows a longitudinal section through a pneumatic nozzle of a gas turbine sectional combustion chamber: in FIG. 2 - section AA in FIG. 1.

The pneumatic nozzle of the gas turbine sectional combustion chamber contains a pipe 1 for supplying fuel, communicated by the dispensing nozzles 2 to the mixing chamber 3 installed in the housing 4 to form a channel 5 for supplying a spray gun (steam or air) connected by tangential openings 6 to the mixing chamber 3. At least one perforated diaphragm 7 is installed in the pipe 1 in front of the nozzles 2, the ratio of the area of the passage sections formed by the holes 8 of the diaphragm 7 to the area of the passage sections of the nozzles 2 being 0.3-0.5.

The device operates as follows.

The fuel enters through the fuel supply pipe 1. Then, through the holes 8 in the diaphragm 7 and the nozzle 2, it is supplied to the mixing chamber 3 formed by the walls 9 and 10 and installed in the housing 4 with the formation of a channel 5 for supplying a sprayer, for example compressed air or steam. From channel 5 the atomizer through tangential 0

5

0

5

0

5

holes 6 are fed into the vortex mixing chamber 3, where it is mixed with the incoming fuel. From the vortex chamber 3, the swirling flow of fuel and the atomizer flows to the nozzle outlet nozzle 11, where it is further crushed by the atomizer exiting from the opening 12. Finally, the atomized fuel enters the combustion zone of the combustion chamber. Diaphragm 8 increases the inertia of the fuel flow and eliminates the influence of possible pressure fluctuations in the firing zone of the chamber due to the unsteadiness of the combustion process.

Claims (1)

The claims A pneumatic nozzle of a sectional combustion chamber of a gas turbine installation, comprising a housing, a mixing chamber with tangential openings in the side wall, mounted therein to form an annular channel for supplying a spray, and a fuel supply pipe arranged along the axis of the chamber with dispensing nozzles opposite the tangential openings of the chamber , characterized in that, in order to increase reliability by eliminating pulsations and increasing the inertia of the fuel flow, it is additionally equipped with at least at least one perforated diaphragm installed in the nozzle in front of the dispensing nozzles, while the perforations of the diaphragm are made with a total passage area of 0.3 ... 0.5 of the total passage area of the dispensing nozzles.