A Fuel Injection System for Regeneratively Cooled Knock Combustion Chamber

Abstract

The invention proposes a fuel injection system suitable for regenerative cooling of the detonation combustion chamber, which mainly includes a fuel tank, a fuel booster pump, a first-stage heat exchanger of the detonation combustion chamber, and a second-stage heat exchanger of the detonation combustion chamber , regenerator, bypass regulating valve, low-pressure ratio turbine, excitation generator, gas-liquid separation chamber and atomizing nozzle. The system uses high temperature and high pressure hydrocarbon fuel to expand and work in the turbine coaxially installed with the excitation generator during the regenerative cooling process to transfer the high heat flow on the wall of the combustion chamber, realize the conversion of heat energy into electric energy, and improve the regenerative cooling capacity; The density difference of the low-temperature and low-pressure mixed fuel is used to separate the small molecular gaseous fuel from the large molecular liquid fuel after cracking, and the small molecule gaseous fuel with excellent detonation performance is sprayed into the combustion chamber in the form of swirling atomized liquid fuel, which can solve the problem of traditional The pressure pulsation problem of mixed fuel injection can realize uniform atomization and mixing.

Description

technical field [0001] The invention relates to the field of detonation engines, in particular to a fuel injection system suitable for regenerating and cooling detonation combustion chambers. Background technique [0002] The detonation propulsion engine is a new concept engine based on detonation combustion. The chemical reaction rate of detonation combustion is extremely fast. The detonation wave generated by its combustion is directly used in the combustion chamber to compress the gas, and the fresh reactant is converted into High temperature and high pressure combustion products, so the detonation combustion is similar to the constant volume combustion. Therefore, the engine thermal cycle based on knocking combustion has higher thermal efficiency than the traditional slow combustion method. In addition, the structure of the detonation engine is relatively simple, eliminating the need for components such as compressors and turbines, and has a high thrust-to-weight ratio....

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Problems solved by technology

[0006] Combined with the existing research and design scheme of regenerative cooling detonation combustor, the present invention proposes a fuel injection system suitable for regenerative cooling detonation combustor to solve the pressure pulsation problem of gas / liquid mixed fuel injection and realize uniform atomization and mixing Mixing, while meeting the cooling requirements of the wall of the detonation combustion chamber under high-frequency and long-term working conditions

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