Mini type engine combustion chamber evaporation pipe structure with whirlcone

Abstract

The invention provides a mini type engine combustion chamber evaporation pipe structure with a whirlcone. By means of the structure, the mixing degree between fuel oil in a mini type combustion chamber and air can be effectively improved, forming of a backflow area is facilitated, and accordingly the combustion efficiency and the combustion stability are improved. A double-level whirlcone structure is additionally arranged at a tail end outlet of an evaporation pipe, and due to the fact that a certain angle is formed by each of a first-level whirlcone blade and a second-level whirlcone blade and the axis of the evaporation pipe, after the mixed airflow of the fuel oil and air passes through the first-level whirlcone blade and the second-level whirlcone blade, the flowing state changes, rotational flow is formed, and the oil-gas mixing degree is improved; and a certain backflow area can be formed in the combustion chamber through the rotational flow, accordingly airflow is stabilized, flames are more stable, and better combustion is promoted. On the other hand, due to the fact that the first-level whirlcone blade and the second-level whirlcone blade are opposite in rotation direction, large shear force can be generated between two-level ejected airflow, later fuel oil liquid drops and evaporated fuel oil liquid drops in the evaporation pipe can be better atomized, the oil-gas mixing degree can be better improved, and the combustion efficiency is improved.

Description

technical field [0001] The invention belongs to the field of micro-engine combustion chambers, and in particular relates to a novel evaporating tube design which can effectively improve the mixing degree of fuel and air, make the distribution of fuel more uniform, stabilize air flow, and improve combustion efficiency. Background technique [0002] In recent years, micro power system has become a domestic research hotspot, and micro engine has also become one of the most promising powers. It has the advantages of small size, light weight, large output energy, and high density. The micro-combustion chamber is an important part of the micro-engine, and its design is also a key link in the design of the micro-engine. [0003] In the micro combustor, there are generally two oil supply methods: evaporator tube oil supply and centrifugal oil thrower oil supply. Among them, the evaporator tube oil supply is widely used because of its simple structure and high atomization efficiency...

AI Technical Summary

Problems solved by technology

[0004] At present, the design types of the evaporator tube structure mainly include simple straight tube type and "L" type. The mixing degree of fuel and air in the combustion chamber through these two types of evaporator tubes is not ideal, and the combustion is not stable enough.

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