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Scramjet engine combustion enhancing device based on dielectric barrier discharge

A technology of dielectric barrier discharge and scramming, which is applied in the direction of ramjet engines, combined engines, mechanical equipment, etc., can solve the problems of unclear combustion-supporting effect and small area of ​​nanosecond pulse discharge discharge, so as to increase the number of electrons and The number of active free particles, enhanced combustion stability, and high electromagnetic compatibility

Active Publication Date: 2021-09-07
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, the discharge area of ​​nanosecond pulse discharge is small, and the combustion-supporting effect in liquid fuels such as kerosene is not yet clear.
Nanosecond pulse discharge will bring strong electromagnetic interference, which brings certain challenges to the electromagnetic compatibility of related equipment

Method used

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  • Scramjet engine combustion enhancing device based on dielectric barrier discharge
  • Scramjet engine combustion enhancing device based on dielectric barrier discharge

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, in t...

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Abstract

The invention provides a scramjet engine combustion enhancing device based on dielectric barrier discharge. According to the scramjet engine combustion enhancing device based on dielectric barrier discharge, the dielectric barrier discharge is combined with a concave cavity of a scramjet engine, and surface dielectric barrier discharge is achieved by means of a concave cavity step or a metal bottom wall. Partial ionization of a flow field is promoted through dielectric barrier discharge to form plasma, the action area of the plasma and airflow in a combustion chamber is increased, mixing of fuel and the air is hopefully enhanced, the number of active particles in the concave cavity is increased, the chemical reaction path is changed, combustion is effectively enhanced, the combustion efficiency is improved, and the flame stability is improved.

Description

technical field [0001] The invention belongs to the technical field of scramjet engines, and in particular relates to a combustion enhancement device for scramjet engines based on dielectric barrier discharge. Background technique [0002] The air flow in the scramjet combustion chamber is too fast, and the residence time of fuel and air in the combustion chamber is extremely short. It is difficult for the fuel to fully burn in such a short residence time, so it faces a huge challenge for flame stability. The scramjet usually uses a cavity as a flame stabilizer, but the structure of the cavity has a certain stability limit. When the flow conditions, fuel equivalence ratio, etc. change and exceed the stability limit of the cavity, it will face the risk of blowing out . [0003] At present, the combustion enhancement scheme of scramjet mainly adopts nanosecond pulse discharge. The discharge time of nanosecond pulse discharge is usually on the order of nanoseconds, because of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K7/20
CPCF02K7/20
Inventor 朱家健田轶夫冯戎蔡尊孙永超王成龙汪洪波孙明波
Owner NAT UNIV OF DEFENSE TECH
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