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Sliding arc plasma stimulating type cavity flame holder

A flame stabilizer and plasma technology, which is applied in the fields of plasma, combustion method, lighting and heating equipment, etc., can solve the problems of increasing the volume and weight of the ramjet engine and the complexity of the system, reducing the probability of flame extinction, widening the flameout boundary, Enhance the effect of burning

Active Publication Date: 2020-09-25
AIR FORCE UNIV PLA
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the mechanical adjustable structure will inevitably introduce more control mechanisms, the system is complex, and the volume and weight of the ramjet will increase.

Method used

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  • Sliding arc plasma stimulating type cavity flame holder
  • Sliding arc plasma stimulating type cavity flame holder
  • Sliding arc plasma stimulating type cavity flame holder

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specific Embodiment

[0044] In a specific embodiment of the present invention, the insulator 103 is made of high-temperature-resistant alumina ceramics sintered at high temperature, the depth of the cavity is 15 mm, the length of the bottom surface of the cavity is 100 mm, and the inclination angle of the inclined wall behind the cavity is 45°. The first, second, third, and fourth discharge electrodes 101, 102, 104, and 105 are processed from high-temperature-resistant nickel-based superalloys. The first discharge electrode 101 is as wide as the cavity, has a height of 15 mm, and a distance of 2 mm from the bottom surface of the cavity. The second discharge electrode 102 is composed of 6 square and rectangular electrodes; the distance between the rectangular electrodes is 15mm, and the distance from the front end of the bottom of the concave cavity is 2mm. The fourth discharge electrode 105 is similar in shape and layout to the first discharge electrode 101, installed on the rear inclined wall of ...

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Abstract

The invention provides a sliding arc plasma stimulating type cavity flame holder. The flame holder is composed of an insulator (103), a first discharge electrode (101), a second discharge electrode (102), a third discharge electrode (104), and a fourth discharge electrode (105); the first discharge electrode (101) and the second discharge electrode (102) constitute a first set of plasma stimulator, and the third discharge electrode (104) and the fourth discharge electrode (105) constitute a second set of plasma stimulator; the first discharge electrode (101) and the fourth discharge electrode(105) are respectively connected with a positive electrode of a plasma power source (301); different rectangular electrodes of the second discharge electrode (102) and the third discharge electrode (104) are respectively in series connection with one of a plurality of coupling capacitors (302); and the other ends of the coupling capacitors (302) are connected with a negative electrode of the plasma power source (301). Compared with existing cavity flame holders, the sliding arc plasma stimulating type cavity flame holder utilizes oil and gas activation, decomposition and heating effects of anenhanced multi-passage sliding arc plasma, and can reduce the probability of flame extinction and widen the boundary of a flame on the basis that structure of an original cavity flame holder is unchanged.

Description

technical field [0001] The invention belongs to the design field of a ramjet combustion chamber, and in particular relates to a sliding arc plasma excitation type concave cavity flame stabilizer, which is suitable for stable combustion in a ramjet combustion chamber under the condition of low Mach number. Background technique [0002] Hypersonic aircraft has outstanding advantages such as strong penetration capability, wide attack range, and rapid global reach. These unique advantages come from the use of a revolutionary power system - the ramjet engine. Compared with the turbine engine, the ramjet engine uses the ram effect of the incoming flow to boost the airflow, cancels the compressor and turbine components, and has a simple structure and light weight. But this also brings about a problem. When the ramjet engine works under the condition of low Mach number, the total pressure and total temperature of the incoming flow will decrease, which will cause difficulty in atomi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/18H05H1/48
CPCF23R3/18H05H1/48
Inventor 吴云张志波崔巍贾敏金迪宋慧敏朱益飞梁华李应红李军
Owner AIR FORCE UNIV PLA
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