Wide-range rotary detonation combustion chamber runner structure and operation method thereof

By designing a wide-domain rotary knock combustion chamber runner structure in a rotary knock combustion chamber, using multiple pressure measurement points and adjustable nozzle throat area, the problems of the narrow working speed range and height variation of the traditional rotary knock ramjet engine are solved, and wide-domain adaptability and efficient combustion are achieved.

CN119713322AActive Publication Date: 2025-03-28NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Application Number
CN202411930737.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-03-28
Estimated Expiration
2044-12-26

AI Technical Summary

Technical Problem

The working speed range of traditional rotary knock ramjet engines is narrow, and the change in working height has a great impact on the characteristics of knock waves, making it difficult to adapt to the needs of wide-domain work.

Method used

A wide-domain rotary knock combustion chamber runner structure is designed, and the combustion state is monitored in real time through multiple static and dynamic pressure measurement points of the outer ring adapter section. The plug-type nozzle adjusts the throat area through the forward and backward movement of the lead screw in the inner column guide rail. The direct injection section meets different combustion needs through multiple sets of ring injection designs. The expansion cavity section consists of a gradually expanded expansion section and a cavity section, equipped with a pre-burst pipe interface and a plasma igniter.

Benefits of technology

The stable operation of rotating knock combustion in wide speed and wide height domains is achieved, ensuring the stability of the combustion state and the efficiency of thrust output, and adapting to the working needs under different Mach numbers.

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Abstract

The invention discloses a wide-range rotary detonation combustion chamber runner structure and an operation method thereof, and belongs to the technical field of rotary detonation ramjet engines. Comprising an equipment throat, an expansion section and an outer ring switching section, the end, away from the equipment throat, of the expansion section is connected with an outer ring switching device, the outer ring switching device is connected with an equal direct oil injection section, the equal direct oil injection section is connected with an expansion concave cavity section, and the expansion concave cavity section is connected with an exhaust nozzle shell; an inner column is arranged in the outer ring switching device and the equal-straight oil injection section and movably connected with a plug type spray pipe. According to the flow channel structure of the wide-range rotary detonation combustion chamber, a plurality of static and dynamic pressure measuring points are arranged on the surface of the outer ring switching section, so that the combustion state is monitored in real time; the plug type spray pipe moves back and forth in the inner column guide rail through the lead screw, and the throat area is flexibly adjusted so as to adapt to the working range from the low Mach number to the high Mach number. The equal direct oil injection section ensures different combustion requirements through a multi-group annular injection design; the expansion concave cavity section is provided with a pre-explosion pipe connector and a plasma igniter installation panel, and the multi-work ignition requirement is met.
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