A microwave antenna module for scramjet

Abstract

The invention provides a microwave antenna module used for a supersonic combustion ramjet engine. The microwave antenna module is arranged on the inner wall face of an engine combustion chamber and comprises a grounding part, an antenna oscillator and a ceramic dielectric; the grounding part for providing the antenna grounding end face is mounted on the inner wall face of the engine combustion chamber, and an open hole is formed in the grounding part and internally provided with the antenna oscillator in an embedded mode; one end of the antenna oscillator is exposed out of the inner wall faceof the engine combustion chamber, and the other end of the antenna oscillator extends out of the engine combustion chamber; and the position between the antenna oscillator and the open hole is filledwith the ceramic dielectric to enable the microwave antenna module to emit microwaves under the set temperature and pressure. Stability of igniting and flames of the supersonic combustion ramjet engine can be enhanced through the microwaves, a high-temperature-resistant ceramic material is added, and thus the module has the properties of resisting to high temperature, high pressure and high-speedairflow; and through the parameter design, the end face of the ceramic dielectric keeps flush with the end face of the grounding part, the inner wall structure of the combustion chamber is not influenced, and meanwhile the demand for large power can be met.

Description

technical field [0001] The invention relates to the technical field of aerospace scramjet engines, and in particular provides a microwave antenna module for scramjet engines. Background technique [0002] The scramjet engine is the primary key technology for the realization of hypersonic vehicles, and it is one of the hot fields that countries around the world are competing to develop. The combustion chamber of the scramjet engine has the characteristics of high temperature, high pressure, and ultra-high flow rate, but it is very difficult to ignite the combustion chamber of the scramjet engine, and it is also very difficult to maintain the stable combustion of the scramjet engine. Due to the very short mixing and burning time of air and fuel, the difficulty of burning control is no less than that of lighting a match in a 14-level typhoon. The working window of the scramjet engine is extremely narrow, and if it misses a little bit, it cannot maintain its work. As the combu...

AI Technical Summary

Problems solved by technology

Traditional monopole antennas can achieve conventional microwave transmission, but they have structural defects and cannot meet the special needs of high-speed airflow conditions; microstrip antennas can achieve wall emission without affecting the flow field, but they cannot withstand high temperatures, and The requirement of high power cannot be realized; the horn antenna, etc. will change the structure of the combustion chamber

Therefore, in the environment of high temperature, high pressure, high-speed airflow and without affecting the structure of the combustion chamber, the existing antennas cannot meet the requirements.

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