Support plate flame stabilizer with fin vortex generators

Abstract

The invention relates to a support plate flame stabilizer with fin vortex generators. The support plate flame stabilizer mainly comprises a front edge, a straight section and a V-shaped tail edge, and 3-5 pairs of trapezoidal fin vortex generators are arranged on each of the two side surfaces of the straight section. The support plate flame stabilizer with the fin vortex generators has the advantages and beneficial effects of good flame stability, high flame propagation speed, small flow resistance loss and high combustion efficiency.

Description

technical field [0001] The invention relates to a support plate flame stabilizer with a finned vortex generator, which can be used for an integrated afterburner of an aero-engine with a high thrust-to-weight ratio, and belongs to the field of aviation technology. Background technique [0002] The new-generation afterburning turbofan engine pursues a high thrust-to-weight ratio. In terms of the afterburner, it requires simple parts, low cold flow resistance loss, a small proportion of the length of the afterburner section, and high afterburner efficiency. The afterburner uses a flame stabilizer to stabilize the flame and organize combustion, and the performance of the flame stabilizer is a decisive factor affecting the performance of the afterburner. Most of the new generation of afterburning turbofan engines use an integrated afterburner with an integrated design of rectifying struts and flame stabilizers. However, the conventional support plate flame stabilizer produces Ka...

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Problems solved by technology

However, the conventional support plate flame stabilizer produces a Karman vortex street type reflux vortex, which has poor stability and will lead to local unstable combustion.

[0003] Due to the small proportion of the length of the afterburner section, the distance from the fuel injection to the trailing edge of the flame stabilizer is correspondingly reduced, and the fuel atomization, evaporation and mixing are insufficient before being ignited, which easily leads to combustion instability and instability caused by the backflow vortex. After the combustion is superimposed, the problem of combustion instability will be magnified, which will affect the combustion reaction process; the distance from the rear edge of the flame stabilizer to the outlet of the nozzle will be correspondingly reduced, the combustion section will be shortened, and the flame in the recirculation area behind the flame stabilizer will not have time to spread throughout the entire combustion in the horizontal direction In the chamber, part of the oil-air mixture is not fully burned, and part of the oil-air mixture is directly discharged without participating in the combustion, thus seriously affecting the afterburner efficiency

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