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A ramp device applied to the combustion chamber of a circular section ramjet engine

A technology of ramjet and ramp device, which is applied to ramjet engines, mechanical equipment, etc., can solve problems such as unfavorable mixing and combustion, short fuel residence time, and short spread distance of fuel, so as to improve mixing efficiency and promote The effect of fuel mixing

Active Publication Date: 2016-09-14
NAT UNIV OF DEFENSE TECH
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  • Summary
  • 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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  • A ramp device applied to the combustion chamber of a circular section ramjet engine
  • A ramp device applied to the combustion chamber of a circular section ramjet engine
  • A ramp device applied to the combustion chamber of a circular section ramjet engine

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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 present invention is a ramp device applied to the combustion chamber of a circular section ramjet engine, which consists of a collar and a ramp device, the collar and the ramp device are fixed together; the collar is embedded in the isolation section and the concave cavity section of the combustion chamber, and It rotates relative to the isolation section and the concave cavity section; the slope device is composed of several slopes, which is a "tetrahedron" structure, and the surface in contact with the collar is a curved surface, and the other three surfaces are planes. The invention generates vortex and rotary motion shock wave through slope rotation to enhance fuel mixing and combustion, thereby improving the performance of the engine.

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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Patent Type & Authority Patents(China)
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