Cascade high-energy plasma scramjet ignition apparatus and method
By using a two-stage discharge structure of a cascaded high-energy plasma scramjet ignition device, the problem of reliable re-ignition of the scramjet engine combustion chamber is solved, achieving efficient ignition capability and reusability.
CN116517702BActive Publication Date: 2026-06-12AIR FORCE UNIV PLA
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AIR FORCE UNIV PLA
- Filing Date
- 2023-04-19
- Publication Date
- 2026-06-12
AI Technical Summary
⚠Technical Problem
Existing electric ignition systems for aero engines cannot meet the ignition requirements of scramjet engine combustion chambers, especially at high airflow velocities where reliable re-ignition is difficult to achieve.
⚗Method used
The device employs a cascaded high-energy plasma scramjet ignition system. Through a two-stage discharge structure, the plasma jet generated by the first-stage discharge triggers the second-stage large-area discharge, forming an initial fire core and enhancing ignition capability.
🎯Benefits of technology
It enables reliable re-ignition of the scramjet engine combustion chamber, improves discharge efficiency and ignition energy, and meets the requirements for engine reuse.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN116517702B_ABST
Abstract
Disclosed is a cascaded high-energy plasma scramjet ignition device, comprising an igniter anode (102), a first-stage cathode (101), first, second and third insulating ceramics (103, 105, 106), a jet hole (104) and a cavity stabilizer (107). A cascaded high-energy plasma scramjet ignition method is also provided. The present application is based on the design idea of'small-energy discharge triggering large-energy discharge', and the working process of the ignition system is divided into two stages. The spark generated in the first stage is not directly used for igniting the combustion chamber, but is used for triggering the large-energy long-distance discharge in the second stage. The increase of the discharge distance is conducive to improving the discharge efficiency, increasing the discharge energy and improving the ignition capacity. In addition, the coupling of the cathode and the scramjet combustion chamber wall can facilitate the sliding of the spark generated by the ignition system along the cavity wall, further improve the discharge efficiency and ignition energy, and thus realize the reliable and repeated ignition of the scramjet engine combustion chamber.
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