A blunt body flame stabilizer with a swirling vortex structure

A flame stabilizer and cyclone technology, applied in the field of combustion, can solve problems such as the inability to form a low-pressure center, the unstable structure of the recirculation zone, and the formation of a vortex, and achieve the effect of expanding the boundary
CN111780160BActive Publication Date: 2022-03-08INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
Publication Date
2022-03-08

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Abstract

The invention provides a bluff body flame stabilizer with a swirl trapped vortex structure, which is used for flame stabilization in a combustion chamber of a high-speed aircraft. The flame stabilizer includes a casing and V-shaped grooves uniformly distributed in the casing along the circumference. and a cyclone radially distributed in the V-shaped groove, wherein the V-shaped groove is disconnected at the installation of the cyclone. The bluff body flame stabilizer with the swirl trapped vortex structure of the present invention generates trapped vortices in the flow field through the swirler, provides a stationary point of flame stability under near-lean extinction conditions, and effectively expands the stable operation of the combustion chamber. border.
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Description

technical field

[0001] The invention relates to the field of combustion, in particular to a blunt body flame stabilizer with a swirling vortex structure applied to a combustion chamber of a high-speed aircraft. Background technique

[0002] Combustion stability is an important basis for evaluating the reliability of aeroengine afterburner. The flame stabilization in the combustion device is mainly achieved by creating a recirculation zone downstream of the flame stabilizer by swirl or blunt body flow. There are several mechanisms by which the recirculation zone stabilizes the flame. Based on the point of view of velocity matching, there will be a transition zone where the velocity gradually changes between the return flow and the incoming flow in the recirculation zone, and there is a flame stabilization zone that can match the flame propagation speed in this region; , the heat absorption of the incoming air mixture and the heat release of high-temperature combustion produ...

Claims

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