RU1813907C - Apparatus for heating exhaust gases of gas turbine - Google Patents

Abstract

Usage: in the aviation industry. SUMMARY OF THE INVENTION: the device comprises a housing installed on its inner surface in one with groups of nozzles, the axes of which are directed tangentially to the surface of the conditional cylinder and pairwise to each other. On the chord of nozzles and perpendicular to the axis of the housing, kerchiefs are installed with the same immersion depth in the flow part of the mixing chamber within the group, but different for different groups: 4 silt.

Description

The invention relates to the field of gas turbine construction, in particular to devices for heating the exhaust gases of a gas turbine, for example, in front of a heat exchanger.

The purpose of the invention is to increase the efficiency of the process in variable robot conditions.

The indicated goal is achieved by that. that in a device including flame stabilizers, a fuel manifold and a housing, on the lateral surface of which there is a group of nozzles in one dimension for approaching the fuel tangentially to the surface of a conditional cylinder, moreover, the axis of the nozzles within the group are pairwise directed towards each other, and each nozzle is equipped with a kerchief mounted on the chord of the nozzle and perpendicular to the axis of the body with the same immersion depth in the flow part within the group and different immersion depths for different rpy / in. Such a supply of jets allows eliminating the discreteness limitation and significantly expanding the range of variation of operating parameters in which high mass transfer efficiency is ensured, which is explained by the intensification of convection. active and turbulent components due to the collision of the jets of one group.

Differences in the depth of immersion of the kerchief b in the flow part (for different groups) makes it possible to exclude collisions of jets belonging to different groups and the resulting decrease in the quality of mixing. distinguish in the path of the jets

It is known that,

With

so o oh

VI

U -

, -0.3931

/2.40,393

where y is the coordinate:

x is the abscissa;

q is the hydrodynamic parameter;

as is the jet shape coefficient at the mouth, i.e. function

d is the nozzle diameter; indices: s-axis of the jet;

e- equivalent.

Thus, the difference b makes it possible to provide different values of as and, therefore, xs for ys const and thus to eliminate the collision of jets belonging to different groups, taking into account the increase in the width of the boundary layer.

In FIG. 1 shows a schematic diagram of the proposed device; in FIG. 2 is a section AA in FIG. 2; in FIG. 3 shows group layouts; in FIG. 4 is a section BB in FIG. 2 ..

The device consists of a housing 1, on the lateral surface of which are made in one at a time with several groups of nozzles 2 tangentially to the surface of the conditional cylinder and pairwise towards each other. The nozzles 2 are in communication with the manifold 3, and each nozzle is equipped with a scarf 4, mounted along the chord of the nozzle and perpendicular to the axis of the housing 1 with the same depth of immersion of the scarf 4 in the flow part within the group and different depth of immersion for different groups. The device contains a stabilizer 5.

The device operates as follows.

The combustion products move in the housing 1, and the fuel from the manifold 3 through nozzles 2 flows into the housing and mix efficiently, including in variable modes. The mixture ignites on stabilizers 5 and burns in length,

The proposed scheme for supplying jets makes it possible to ensure the efficient flow of diffusion processes, including in variable modes. In this case, collision of jets belonging to different groups due to different

b values for different groups. As the studies carried out in the Hydrogasdynamics laboratory f and combustion showed that the difference condition b for different groups of nozzles allows to obtain the maximum value of the mixing quality in a wide range of variation of the operating parameters. Experimental studies are given when

G 0-0.80; p 1.0-2.65 bi var

F Gi b Gi + G2

where G is the mass flow rate; p is the density; B the depth of immersion of the scarf in the flow

part;

indices: 1 - transverse jets; 2. - stream;

cm mixture; I is the group number.

Claims (1)

SUMMARY OF THE INVENTION A device for heating an exhaust gas of a gas turbine, comprising a fuel manifold, a housing with one set of nozzles mounted on its inner surface, the axes of which are directed tangentially to the surface of a conditional cylinder, characterized in that, for the purpose of efficiency of the mixing process on variables modes, the device is equipped with additional groups of nozzles and kerchiefs installed in the latter along the chord, perpendicular to the axis of the body with the same depth of immersion of the kerchief in the flow part of the mixing chamber within the group and with different immersion depths for different groups, with nozzles installed in pairs facing each other. FIG. 4