Oxygen-enriched fuel gas propelling achieved supplementary fired cyclic engine system and thrust deep adjusting method

Abstract

The invention relates to a thrust deep adjusting method of an oxygen-enriched fuel gas propelling achieved supplementary fired cyclic engine. When a supplementary fired cyclic engine works, a fuel entering into a fuel gas generator through a fuel path of the fuel gas generator and an oxidant entering into the fuel gas generator through an oxidant supply path combust, generated oxygen-enriched fuelgas drives a main turbine to work to drive the main turbine to rotate and work, and the fuel gas enters a thrust chamber through a fuel gas supply path of the thrust chamber to generate a thrust; theengine stays in an oxygen-enriched fuel gas independent propelling state and keeps a low thrust working condition, a fuel main valve of the thrust chamber is opened when the engine needs to enter into a primary working condition to work, and the fuel enters the thrust chamber for supplementary firing, so that the engine is converted into a rated thrust to work. The thrust deep adjusting method ofthe supplementary fired cyclic engine provided by the invention is simple in system, has no special demands on combustion device and can achieve deep adjustment of the engine thrust.

Description

technical field [0001] The invention relates to an engine system and thrust depth adjustment method using oxygen-enriched gas propulsion to realize a post-combustion cycle, in particular to an active force (liquid rocket engine) and a reusable rocket main force used for the descent of a manned lunar lander. In terms of power, the thrust depth adjustment method of the afterburning cycle engine that provides power for the soft landing of the lander and the rocket. Background technique [0002] For future large-scale interstellar landing vehicles and reusable vehicles, in order to improve transportation efficiency and the reachable range of the planet's surface, it has great advantages to adopt low-temperature propulsion systems with high specific impulse, such as liquid oxygen kerosene, liquid oxygen methane and liquid oxygen Cryogenic propulsion systems such as liquid hydrogen. Large-scale interstellar landing vehicles and reusable vehicles require pump-type engines to impro...

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Problems solved by technology

[0005] However, the current thrust adjustment scheme adopted by the afterburning cycle engine is complicated, and the thrust depth adjustment is difficult. When the combustion components work under the working condition of less than 3:1, special measures need to be taken to ensure the injection pressure drop, and the components have poor adaptability to low working conditions.

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