Gas-gas mixed flame stabilization device

The technology of a flame stabilizing device and a mixer is applied in combustion methods, lighting and heating equipment, continuous combustion chambers, etc., and can solve problems such as difficulty in efficient and uniform mixing, and limited penetration ability of fuel-rich gas, so as to improve penetration ability, Reduce the difficulty of heat protection and achieve high reliability

CN110160083BActive Publication Date: 2020-08-18XIAN AEROSPACE PROPULSION INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-08-18

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Abstract

The invention provides a gas-gas mixing flame stabilizing device, and relates to the technical field of engines; the gas-gas mixing flame stabilizing device comprises a beveling type lobed mixer and acover plate; the beveling type lobed mixer is of a hollow conical columnar structure with openings in two axial ends; the cover plate is of a plate-type structure with an indent section; the inlet end of the beveling type lobed mixer is connected with the outlet end of an external turbine; the shape of the indent face of the cover plate is consistent with the shape of the beveling type lobed mixer; the indent face of the cover plate is fixedly installed on the outlet end face of the beveling type lobed mixer correspondingly; the convex face of the cover plate is in butt joint with the inlet end of an external combustion chamber; the cover plate is of a petal-like structure, and comprises a center plate and n lobes; the center plate is of a circular plate-type structure; and the n lobes are uniformly distributed at the side position of the center plate annularly; and the n is a positive integer between 12-24. The gas-gas mixing flame stabilizing device is simple and reliable in structure and light in weight, and high-efficiency mixed combustion of inner duct fuel-rich gas and outer duct air can be achieved under the condition that the pressure loss is lower (the total pressure recovery coefficient of the fuel-rich gas in the mixer is not less than 0.80).
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Description

technical field

[0001] The invention relates to the technical field of engines, in particular to a gas-gas mixing flame stabilizing device. Background technique

[0002] Combination power engines such as air turbine rocket engines have a wide operating range (Ma0-3.5+), and parameters such as the flow rate, flow rate, temperature, angle, and mixing ratio of air and fuel-rich gas at the inlet of the combustion chamber change continuously with changes in engine operating conditions. Organizing the secondary stable and high-efficiency combustion of internal fuel-rich gas and external air in the combustion chamber is crucial to engine performance, and improving the mixing uniformity of fuel-rich gas and air is the most effective way to achieve high-efficiency combustion in the combustion chamber. The conventional internal and external airflow mixing adopts a lobe mixer, which uses the viscous shear-enhanced mixing of the boundary layer of the two airflows at the trailing edge of...

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0025] The invention provides a gas-gas mixing flame stabilizing device, which realizes the gas-gas mixing and flame stabilizing device before entering the combustion chamber. The structure is simple and reliable, and the weight is light. In the case of a total pressure recovery coefficient ≮0.80), the efficient mixed combustion of internal rich fuel gas and external air is realized, which meets the working requirements of the engine within the range of Ma0-3.5.

[0026] Such as figure 1 Shown is a schematic diagram of the shaft end of the gas-gas mixing flame stabilizing device. It can be seen from the figure that the gas-gas mixing flame stabilizing device includes an obliquely cut lobe mixer 1 and a cover plate 2; wherein, the obliquely cut lobe mixer 1 It is a hollow cone-column structure with openings at both ends in the axial direction; t...