Swirling afterburner chamber based on outer concave cavity

Abstract

The invention discloses a swirling afterburner chamber based on an outer concave cavity. The swirling afterburner chamber based on the outer concave cavity comprises an outer cylinder assembly, a central body assembly and an oil passage assembly; the outer cylinder assembly comprises an outer cartridge receiver and a shock-proof insulation screen; and the central body assembly comprises a swirlingdevice, an inner cartridge receiver, a frustum, a spreader plate and an outer concave cavity flame stabilizer. Through the cooperation among the outer concave cavity flame stabilizer, the swirling device and the frustum, the stability and rapid propagation of the flame in high speed airflow can be achieved by the relatively low resistance loss, so that the high-efficiency and low resistance combustion is achieved, the effective thermal protection to a hot end part is achieved, the uniform and reasonable distribution of the outlet temperature of the combustion chamber is met.

Description

Technical field [0001] The invention belongs to a combustion chamber of a turbofan engine, and particularly relates to an afterburner. Background technique [0002] With the continuous expansion of flight speed and flight airspace, the performance requirements of engines are increasing day by day. The working conditions of modern high-performance turbofan afterburners have changed greatly compared with the previous combustion chambers. [0003] As the temperature of the inlet gas increases greatly, the ignition in the afterburner becomes easier, and the structural reliability problems of components such as the fuel spray rod and the flame stabilizer become prominent. At the same time, the penetration depth of the fuel that evaporates rapidly at high temperature in the high-speed airflow is very small, and the jet cannot be used to promote the mixing of fuel and air. The ignition source formed in the wake of the stabilizer after ignition is difficult to spread around, so In order t...

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Problems solved by technology

[0005] Purpose of the invention: the present invention proposes an afterburner, the combustion chamber realizes the stability and rapid propagation of the flame through the cooperation between the flame stabilizer in the outer concave cavity, the swirl device, and the truncated cone, and solves the difficulty of flame propagation in the existing combustion chamber. The problem of low combustion efficiency, so as to achieve high-efficiency, low-resistance combustion and effective thermal protection for the stability and oil supply structure, and to meet the uniform and reasonable distribution of the outlet temperature of the combustion chamber

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