Oil supply and cooling integrated air suction type pulse detonation engine structure

Abstract

The invention provides an oil supply and cooling integrated air suction type pulse detonation engine structure. The oil supply and cooling integrated air suction type pulse detonation engine structureis characterized in that a fuel oil channel is formed in the wall face of the DDT section of the front middle section of a combustion chamber, high temperature of the DDT section of the pulse detonation combustion chamber is fully utilized, fuel oil is preheated and pre-evaporated to a certain extent, and subsequent atomization and combustion process are facilitated; the fuel oil absorbs heat, sothat the wall surface temperature of the front middle section, namely the DDT section, of the combustion chamber is greatly reduced, and compared with traditional air cooling, cooling effects are remarkably improved due to the fact that fuel oil specific heat is far larger than that of air; cooling inlet air, cooling liquid and external auxiliary equipment are omitted, so that sufficient air participates in combustion in the combustion chamber, a working range of an engine is widened, and the thrust-weight ratio is increased; a large number of oil spraying holes are formed in the wall face ofthe front middle section of the engine and the wall face of an engine inlet, a large-area and full-space oil supply mode enables oil and gas in the engine combustion chamber to be evenly distributedand combusted sufficiently, and accordingly the working stability of the pulse detonation engine can be improved; and fuel oil sprayed out of the oil spraying holes in the wall face of the front middle section and incoming flow form a certain angle, and the DDT distance is shortened to a certain extent through disturbance effects, and therefore the axial length of the engine is reduced.

Description

technical field [0001] The invention belongs to the field of pulse detonation engines, and in particular relates to an oil supply and cooling integrated air-breathing pulse detonation engine structure. Background technique [0002] Pulse detonation engine (PDE) is an engine that uses pulsed detonation waves to generate thrust, which has the following potential advantages: high thermal cycle efficiency, simple structure, light weight, large thrust-to-weight ratio, large specific impulse, low unit fuel consumption, Wide range of work, etc. It can not only be used as an independent propulsion device, but also can be combined with turbojet or turbofan engine to provide power for subsonic or supersonic flying aircraft. When the PDE frequency is above 100Hz, it can be considered that the working process is continuous. The thrust, fuel consumption rate, and thrust-to-weight ratio of the combined engine are all doubled compared with the turbofan engine with afterburner. [0003] A...

AI Technical Summary

Problems solved by technology

However, in the practical application of these methods, auxiliary equipment must be added, which obviously cannot be effectively used on future aircraft.

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