Solid fuel ramjet engine

Abstract

The invention relates to a solid fuel ramjet engine. The solid fuel ramjet engine comprises a storage tank, the storage tank comprises a fuel storage tank and a coolant storage tank, the fuel storage tank is filled with solid fuel, and the coolant storage tank is filled with coolant. The ramjet engine further comprises a heat exchanger, a turbine, a fuel pump, a coolant pump, an injector, a combustion chamber, a cooling channel and a pipeline. The solid fuel comprises normal-temperature blocky solid metal or normal-temperature solid nonmetal energetic materials. The solid fuel ramjet engine has the advantages that metal blocks and the solid nonmetal energetic materials are directly used as the fuel of the ramjet engine, no anti-settling agent needs to be added, the fuel wire drawing phenomenon in the injection process is reduced, the combustion efficiency is improved, the net thrust of the ramjet engine is improved, the flame stability is higher, the energy density of the fuel is improved, when the blocky solid fuel reaches the self ignition temperature, the blocky solid fuel can directly participate in combustion after making contact with air, the structural mass of a combustion chamber is reduced, and the waste heat utilization rate is further increased.

Description

【Technical field】 [0001] The invention relates to the technical field of aircraft power, in particular to a solid fuel ramjet engine. 【Background technique】 [0002] The ramjet engine is a kind of air jet engine that uses the oncoming airflow to enter the engine and then decelerates to increase the static pressure of the air. When the ramjet engine is working, the high-speed airflow blows towards the engine, expands and decelerates in the air intake, and the air pressure and temperature After rising, it enters the combustion chamber and combusts with fuel. The high-temperature gas then expands and accelerates through the propulsion nozzle, and is discharged from the nozzle at high speed to generate thrust. [0003] At present, the fuel of ramjet engines mostly uses liquid hydrocarbon fuel, liquid hydrogen, and metal-containing particle gel fuel. These three fuel systems have the following problems: the energy density of hydrocarbon fuel fuel is low, which increases the volum...

AI Technical Summary

Problems solved by technology

[0003] At present, the fuel of ramjet engines mostly uses liquid hydrocarbon fuel, liquid hydrogen, and metal-containing particle gel fuel. These three fuel systems have the following problems: the energy density of hydrocarbon fuel fuel is low, which increases the volume of the aircraft; during the active thermal protection process Fuel is prone to carbon deposition and gelation when heated, which will block the pipeline and shorten the flight time; fuel supply is difficult under low temperature conditions

Anti-settling agents are added to the gel fuel containing metal particles, resulting in increased fuel viscosity, serious fuel stringing during the injection process, greatly reduced atomization effect, and reduced combustion efficiency of the gel component; metal particles are wrapped by the gel component , can not be in direct contact with the stamping flow, resulting in ignition failure or low-efficiency combustion of metal particles; metal particles are solid, and they need to absorb heat in a block solid state before they can react quickly. Efficient combustion during the ramming combustion process of time; there are also problems such as difficulty in fuel supply at low temperatures

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