A cyclone atomization device with staged combustion

Abstract

The application belongs to the design field of the main combustion chamber of an aero-engine, and in particular relates to a swirl atomization device for staged combustion. Including: outer swirler, middle swirler, inner swirler, inner support plate and nozzle A. One end of the first wall of the outer swirler is connected to the flame tube E; the middle swirler includes a second wall and second blades, the middle swirler is nested inside the outer swirler, the second wall and the second One blade is connected, and the outer air flow channel B is formed between the second wall plate and the first wall plate; the inner swirler includes the third wall plate and the third blade, the inner swirler is nested inside the middle swirler, and the third The wall plate is connected to the second blade, and the middle air flow channel C is formed between the third wall plate and the second wall plate; the inner support plate is nested inside the inner cyclone, the inner support plate is connected to the third blade, and the inner support plate is connected to The inner air flow channel D is formed between the third wall plates; the nozzle A is nested inside the inner support plate and fits in the gap with the inner support plate, the side wall of the nozzle A is provided with a main nozzle, and the end of the nozzle A is provided with a secondary nozzle.

Description

technical field [0001] The application belongs to the design field of the main combustion chamber of an aero-engine, and in particular relates to a swirl atomization device for staged combustion. Background technique [0002] The swirl atomization device at the head of the flame tube in the main combustion chamber of an aero-engine generally adopts the structural form of a single-stage or multi-stage swirler combined with a centrifugal pressure atomization nozzle. [0003] In the prior art, the swirling atomization device at the head of the flame tube in the main combustion chamber is composed of a fuel nozzle, a main swirler and a secondary swirler, and the nozzle can be a single oil circuit centrifugal pressure atomization nozzle or a double oil circuit centrifugal type Pressure atomizing nozzles. The swirler is used to create a recirculation zone in the flame tube to ensure stable and efficient combustion. The atomization of fuel is mainly achieved by the pressure differ...

AI Technical Summary

Problems solved by technology

The main disadvantages of the existing technical solutions are as follows: when the engine is in a large working condition, the pressure in the main combustion chamber is high, the aerodynamic force is enhanced, and the resistance of the oil droplets in the airflow increases, so that the fuel near the nozzle is relatively concentrated, causing smoke, carbon deposits, Combustion efficiency reduction and other issues; when the engine is in a small working condition, the fuel supply to the main combustion chamber is low, the atomization level of the nozzle is poor, the combustion stability is poor, and it is prone to flameout; it is impossible to achieve good atomization and combustion under all working conditions Oil and gas matching, high exhaust pollution, does not meet the increasingly stringent aero engine exhaust pollution restrictions

Images