Integrated structure of evaporator tube, evaporator tube combustor and micro turbojet engine

Abstract

The invention discloses an integrated structure of evaporator tube, evaporator tube type combustion chamber and micro-turbojet engine, which are used for impacting and mixing the fuel sprayed by the fuel nozzle through high-speed airflow to form a fuel-air mixture and spray it into the combustion chamber In the head area, the integrated structure of the evaporating tube includes an evaporating tube integrated with the supporting ring of the combustion chamber. A plurality of evaporating tubes are evenly arranged on the supporting ring of the The intake end of the high-speed airflow input, the second end of the evaporator tube is the outlet end for fuel-air mixture injection, the evaporator tube includes a corrugated section near the intake end, and the corrugated section is provided with radially outward protrusions along the evaporator tube. The fuel nozzle is inserted into the corrugated section of the evaporator tube from the outlet end of the evaporator tube, so that the fuel sprayed by the fuel nozzle is impacted and mixed by the high-speed airflow in the corrugated section to form a fuel-air mixture, and then from the evaporator tube The outlet end of the nozzle is sprayed to the head area of ​​the combustion chamber.

Description

technical field [0001] The present invention relates to the technical field of micro-turbojet engines, in particular, to an integrated structure of evaporation tubes, an evaporation tube-type combustion chamber and a micro-turbojet engine. Background technique [0002] Micro-turbojet engines have the characteristics of small size, light weight, simple structure, low cost, short life, convenient maintenance and use, etc. Micro-turbojet engines mostly use evaporative tube combustion chambers, which have the advantages of simple structure, low manufacturing cost, and low fuel supply pressure. The evaporator tube is an important part of the combustion chamber, which is used to fully mix and atomize the fuel. [0003] The evaporating tube structure in the existing micro-turbojet engine is a tubular structure of equal section and uniform wall thickness welded and fixed on the support ring. , through the high-speed airflow entering the evaporation tube from the intake end, the fu...

AI Technical Summary

Problems solved by technology

[0005] The invention provides an evaporating tube integrated structure, an evaporating tube type combustion chamber and a micro-turbojet engine to solve the problem of insufficient fuel atomization in the evaporating tube structure of the existing micro-turbojet engine, and a plurality of evaporating tubes welded to The technical problem of poor temperature field at the outlet of the combustion chamber due to large concentricity deviation on the support ring

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