Flame stabilizing device and method for supporting plate with cavities

Abstract

The invention provides a flame stabilizing device and method of an afterburner for a gas turbine engine. In the device, the original turbine rear frame supporting plate is replaced with the supporting plate with the cavities; and the device is characterized in that: the section of the supporting plate is in the shape of a wing with a suddenly expanded trailing edge and is provided with the cavities. The aim of stabilizing flame is fulfilled through a low-speed backflow region formed by flowing gas flow through the cavities of the supporting plate and the suddenly expanded part of the trailing edge. The invention provides the turbine rear frame supporting plate (2) of the afterburner for the gas turbine engine; the afterburner comprises a case (12), a turbine rear frame inner wall (1) and a plurality of turbine rear frame supporting plates (2), wherein the turbine rear frame supporting plates (2) are connected with the case (12) and the turbine rear frame inner wall (1); and the turbine rear frame supporting plate (2) is characterized by being provided with the cavities (9).

Description

technical field [0001] The invention relates to a flame stabilizing device for an afterburner in a gas turbine engine with afterburner, and more specifically relates to a scheme for improving the flame stabilization characteristics of the afterburner. Background technique [0002] The afterburner has been an important component of fighter jet engines since its invention. It adopts a direct-flow organization combustion scheme to greatly increase engine thrust in a short period of time. Traditional afterburners usually arrange V-shaped flame stabilizers in the flow field, and use high-speed airflow to bypass the recirculation zone formed by the blunt body structure to stabilize the flame and tissue combustion. However, the traditional blunt body stabilizer brings flow passage blockage and total pressure loss while stabilizing the flame, and its large structural size additionally increases the overall weight of the engine. Especially in the non-afterburning state, the addition...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the existing technical deficiencies, increase the vortex area, expand the radial coverage area of ​​the flame, and then increase the engine afterburner without significantly increasing the flow loss and the overall weight of the afterburner. Thrust and afterburner work efficiency, while taking into account the simple structure and easy maintenance

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