Ramjet flame stabilizer

Abstract

The invention provides a flame stabilizing device of an ramjet engine. The flame stabilizing device comprises centrifugal fuel nozzles, direct-current fuel nozzles, a flame stabilizing base and air swirlers, wherein the whole of the flame stabilizing base is of an annular shape, a plurality of air swirlers are arranged in the inner space of the flame stabilizing base, the air swirlers are connected and fixed through a supporting frame, the air swirlers and the flame stabilizing base are connected and fixed through the supporting frame, the centrifugal fuel nozzles and the air swirlers are thesame in number and the centrifugal fuel nozzles are correspondingly arranged on the air swirlers, the direct-current fuel nozzles and the air swirlers are the same in number, the direct-current fuel nozzles are arranged on the flame stabilizing base, and in the annular direction of the flame stabilization base, the direct-current fuel nozzles and the air swirlers are arranged in a staggered mode.According to the flame stabilizing device, a local rotational flow is formed in the head of a combustion chamber of the ramjet engine, a central vortex of the rotational flow can be used for effectively stabilizing flames and swirling fuel gas, then igniting the downstream mixed air. The flame stabilizing device has the advantages of being small in flowing resistance, wide in flame stabilizing range and easy in thermal protection.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and in particular relates to a ramjet flame stabilizing device which utilizes a swirling flow to generate a flame stabilizing area. Background technique [0002] The publication number is 105546578A, and the publication date is an invention patent application on May 4, 2016 - a flame stabilizer. In order to overcome the problem that the oil-gas ratio in the recirculation zone of the flame stabilizer is difficult to control, it is based on the annular V-shaped groove. On the top, a radial V-shaped groove is added, and a number of suction holes are opened on it to suck fuel into the recirculation area. [0003] The publication number is 106642202A, and the publication date is an invention patent application on May 10, 2017 - a flame stabilization device for the combustion chamber of a TBCC sub-combustion ramjet engine, which improves the traditional support plan by adding At the same time, the ...

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Problems solved by technology

[0004] However, the above-mentioned flame stabilizing device has the disadvantages of large flow resistance and difficult thermal protection

The blockage ratio of a typical V-shaped groove or support plate needs to be above 40% to achieve a sufficient pressure difference and form a low-speed recirculation zone at the trailing edge. Such a large blockage ratio increases the flow resistance; at the same time, because the flame is in the V The bottom of the groove or the side of the support plate burns, the flame temperature is high, the heat flow is large, and the heat protection is very difficult. For example, the invention patent application with the publication number 106642202A and the publication date is May 10, 2017-a TBCC sub- The flame in the flame stabilization device of the combustion chamber of the ramjet engine is in the concave cavity of the support plate, so it is difficult to prevent heat

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