Integrated structure of evaporation tubes, evaporation tube type combustion chamber and miniature turbojet engine

Abstract

The invention discloses an integrated structure of evaporation tubes, an evaporation tube type combustion chamber and a miniature turbojet engine. The integrated structure of the evaporation tubes isused to impact and mix fuel sprayed from fuel nozzles through high-speed airflow to form a fuel-air mixture and spray the fuel to the head area of the combustion chamber. The integrated structure of the evaporation tubes comprises a plurality of evaporation tubes integrated with a support ring of the combustion chamber, wherein the evaporation tubes are evenly arranged on the support ring of the combustion chamber in the circumferential direction, first ends of the evaporation tubes are inlet ends for inputting the high-speed airflow, second ends of the evaporation tubes are outlet ends for spraying the fuel-air mixture, the evaporation tubes comprise corrugated sections close to the inlet ends, the corrugated sections are provided with corrugated cavities protruding outwards in the radialdirections of the evaporation tubes, and the fuel nozzles are inserted from the outlet ends of the evaporation tubes into the corrugated sections of the evaporation tubes, so that the fuel sprayed from the fuel nozzles is impacted and mixed by the high-speed airflow in the corrugated sections to form the fuel-air mixture, and then the fuel is sprayed from the outlet ends of the evaporation tubesto the head area of the combustion chamber.

Description

technical field [0001] The invention relates to the technical field of micro-turbojet engines, in particular to an integrated structure of evaporating tubes, a combustion chamber of evaporating tubes and a micro-turbojet engine. Background technique [0002] The micro-turbojet engine has the characteristics of small size, light weight, simple structure, low cost, short life, easy maintenance and use, etc. It is widely used in military aviation or civilian aircraft model power devices such as unmanned aerial vehicles and loitering bombs. The micro-turbojet engine mostly adopts the evaporating tube combustion chamber, which has the advantages of simple structure, low manufacturing cost, and low oil supply pressure. The evaporator tube is an important part of the combustion chamber and is used to fully mix and atomize the fuel. [0003] The evaporator tube structure in the existing micro-turbojet engine, the evaporator tube is a pipe structure with equal cross-section and unif...

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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