Kerosene jet flow precooling small high-speed turbojet engine

Abstract

The invention provides a kerosene jet flow precooling small high-speed turbojet engine. The kerosene jet flow precooling small high-speed turbojet engine is mainly used for solving the problem that under the high-altitude and high-speed condition, the temperature of incoming flow air is high under the air inlet stamping effect, and the working range which can be borne by a compression system of a traditional conventional turbine engine is exceeded. A jet flow kerosene device is additionally arranged in front of an air compressor of a conventional turbine engine, high-temperature air flow of an air inlet channel is cooled through high vaporization latent heat kerosene jet flow, atomization and evaporation, the total temperature of the air flow is reduced or maintained at a certain temperature, an engine compression system works at the bearable inlet air flow temperature, and high Ma flight of the engine is maintained; the compression system adopts the design of a wide reduced rotating speed range, and the stable working margin in the wide speed range of the engine can be met; a combustion chamber adopts a near equivalence ratio combustion design technology, so that the temperature in front of a turbine can be greatly improved, the unit thrust is improved, and the working envelope range of the engine is effectively expanded; and a turbine guider and rotor blades adopt kerosene cooling design, and an engine air system is greatly simplified.

Description

technical field [0001] The invention relates to the field of aircraft power design, and relates to a supersonic aircraft power system, in particular to a small high-speed turbojet engine with kerosene jet precooling. Background technique [0002] As early as the 1950s, foreign countries had carried out research on jet precooling technology. In 2002, the U.S. Defense Advanced Research Projects Agency (DARPA) proposed the Rapid Response Small Load Low-Cost Carriage (RASCAL) program, which took jet precooling technology as one of the key research contents, and at the same time completed the simulation on the F100 engine under high-altitude conditions. The jet pre-cooling technology test verification of air intake heating, the pre-cooling device is installed in the air intake, including a liquid oxygen jet plane and two water jet planes, the front end is a liquid oxygen plane, followed by two spray water planes, which can be independent switch on switch off. The distance betwe...

AI Technical Summary

Problems solved by technology

In the technology of the existing hypersonic power system, small high-speed turbojet engines are often pre-cooled by water injection, but they need to carry a large amount of water, oxidant or volatile agent, and the problem of "dead weight" is difficult to solve, which greatly increases the weight of the aircraft and reduces the weight of the aircraft. Thrust-to-weight ratio, and can only work at supersonic speed for a period of time, and cannot stand by for a long time. It is currently in the demonstration stage and is not suitable for the flight platform's demand for low-cost supersonic power systems.

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