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Slope device applied to circular-section ramjet engine combustion chamber

A ramjet and ramp device technology, applied in ramjet engines, mechanical equipment, etc., can solve the problems of unfavorable mixing and combustion, short fuel residence time, short fuel spanwise propagation distance, etc., to promote fuel mixing and improve fuel efficiency. The effect of mixing efficiency

Active Publication Date: 2014-09-03
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned fixed mixing enhancement device has a short spanwise propagation distance of the fuel, which makes the residence time of the fuel in the combustion chamber short, which is not conducive to mixing and combustion.

Method used

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  • Slope device applied to circular-section ramjet engine combustion chamber
  • Slope device applied to circular-section ramjet engine combustion chamber
  • Slope device applied to circular-section ramjet engine combustion chamber

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] A rotary ramp device applied to the combustion chamber of a circular section ramjet engine, its shape is as follows Figure 1 ~ Figure 3 As shown, it is mainly composed of a collar 1 and a ramp device 2, and the collar 1 and the ramp device 2 are welded together. There are grooves on the front and back of the collar 1 for the collar to be embedded in the isolation section 3 and the cavity section 4 . The profile of ramp device 2 is as Figure 4 As shown, the slope device 2 is composed of several slopes, which is a "tetrahedral" structure, and the surface in contact with the collar is a curved surface, and the other three surfaces are planes. The number of slopes and geometric dimensions can be adjusted according to the performance requirements of the engine. figure 1 The direction of the middle arrow is the flow direction of the main airflow in the combustion...

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Abstract

The invention provides a slope device applied to a circular-section ramjet engine combustion chamber. The slope device is composed of a lantern ring and a slope device body. The lantern ring and the slope device are fixedly connected together. The lantern ring is embedded in an isolation segment and a cavity segment of the combustion chamber and rotates relative to the isolation segment and the cavity segment. The slope device body is composed of a plurality of slopes and is of a tetrahedron-like structure. The surface, making contact with the lantern ring, of the slope device body is a curved surface, and the other three surfaces of the slope device body are flat surfaces. According to the slope device applied to the circular-section ramjet engine combustion chamber, the slopes rotate to generate vortexes and rotational motion shock waves to enhance mixture and combustion of fuel, so that the performance of an engine is improved.

Description

technical field [0001] The invention relates to the technical field of air-breathing hypersonic propulsion, in particular to a ramp device applied to a combustion chamber of a circular-section ramjet engine. Background technique [0002] High-efficiency fuel mixing under supersonic conditions is of great significance to the reliable ignition and stable combustion of scramjet engines. The main difficulty is that the air velocity in the combustion chamber of scramjet engines is on the order of kilometers per second, and the residence time of fuel is on the order of milliseconds. , while the fuel diffusion is limited due to the suppression of the growth rate of the mixed layer due to the supersonic compressibility effect. Fuel and oxidant can only be fully combusted when they are mixed at the molecular weight level. A fuel mixing enhancement device is required to quickly mix the fuel and oxidant at the macro scale, and at the same time generate small-scale oscillations to enhan...

Claims

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Application Information

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IPC IPC(8): F02K7/10
Inventor 金亮雷静颜力黄伟李大鹏吴先宇
Owner NAT UNIV OF DEFENSE TECH