A wave trailing edge strut flame stabilizer with vortex generator

Abstract

The invention relates to a wave trailing edge strut flame stabilizer with a vortex generator. The wave trailing edge strut flame stabilizer is mainly composed of a front edge, a straight section and a V-shaped wave trailing edge. 3 to 5 wedge-shaped vortex generators are arranged, and the wedge-shaped vortex generators are aligned with the peaks of the trailing edge of the V-shaped wave. The advantages and beneficial effects obtained by the present invention are: adopting the wave trailing edge support plate flame stabilizer with a vortex generator, the flame stability performance is good, the flame propagation speed is fast, the flow resistance loss is small, and the combustion efficiency is high.

Description

technical field [0001] The invention relates to a wave trailing edge strut flame stabilizer with a 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 produce...

AI Technical Summary

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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