Small-sized turbofan engine

Abstract

The invention discloses a small-sized turbofan engine. The small-sized turbofan engine comprises an air compressor, a combustion chamber and a power turbine, wherein the air compressor comprises an air compression housing and centrifugal impellers; the power turbine comprises a turbine body and a turbine housing; a connector is arranged in the combustion chamber; the connector is provided with an air compression end cap and a turbine end cap; communication holes are formed in the air compression end cap; a plurality of detonation flame tubes are arranged in the combustion chamber; an air inlet and an air outlet are formed in each detonation flame tube; the air outlets are communicated with the air inlet end of the turbine housing; a one-way valve is arranged at the air inlet of each detonation flame tube; a fuel nozzle and an ignition plug are arranged in each detonation flame tube; and the fuel nozzles are connected through a general fuel tube. According to the small-sized turbofan engine disclosed by the invention, through the sequential detonation of the detonation flame tubes, the turbine body is continuously pushed by utilizing four kinds of pushing force, and detonation force is accumulated by the detonation flame tubes; and under the action of the one-way valves, air successively enters the engine, so that the bypass ratio and the compression ratio of the engine are increased.

Description

technical field [0001] The invention relates to an engine, in particular to a small turbofan engine. Background technique [0002] In a turbofan engine, increasing the supercharging ratio of the fan and compressor can increase the thrust. To increase the supercharging ratio, at present, it is mainly to increase the number of stages of the fan, axial flow compressor, and turbine or to increase the gas temperature before the turbine. However, it is difficult to increase the pressure of the compressor, reduce the volume of the engine, and increase the horsepower by increasing the fuel oil and increasing the number of stages of the compressor. These improvements are helpful for improving the bypass ratio, compression ratio and Thrust-to-weight ratio also can't obtain remarkable effect, and there is no engine by four kinds of thrust acting together in the prior art. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a s...

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Problems solved by technology

[0002] In a turbofan engine, increasing the supercharging ratio of the fan and compressor can increase the thrust. To increase the supercharging ratio, at present, it is mainly to increase the number of stages of the fan, axial flow compressor, and turbine or to increase the gas temperature before the turbine. However, it is difficult to increase the pressure of the compressor, reduce the volume of the engine, and increase the horsepower by increasing the fuel oil and increasing the number of stages of the compressor. These improvements are helpful for improving the bypass ratio, compression ratio and The thrust-to-weight ratio also cannot obtain significant effects, and there is no engine with four kinds of thrust acting together in the prior art

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