Water or methyl alcohol spraying thrust increasing system suitable for small turbojet engine

Abstract

The invention discloses a turbojet engine. The turbojet engine comprises an air inlet way, an air compressor, a combustion chamber, a turbine, a tail spraying pipe, and a thrust increasing device. Airenters the turbojet engine through the air inlet way. The air compressor is arranged behind the air inlet way so that the pressure of air entering through the air inlet way can be increased. Air passes through the air compressor and then enters the combustion chamber to be mixed with fuel oil to be mixed and combusted, and expansion acting is conducted. The turbine and the air compressor are coaxially arranged on an engine shaft so that high-temperature and high-pressure gas flowing out of the combustion chamber can push the turbine to rotate. High-temperature and high-pressure gas flowing out of the turbine continues to expand in the tail spraying pipe and is discharged in the axial direction of the engine. The thrust increasing device sprays liquid into the air inlet way so that the inlet flow of the turbojet engine can be increased.

Description

technical field [0001] The invention relates to the field of aviation, and more specifically relates to an aeroengine and its booster system, which are mainly applicable to small high-speed unmanned aerial vehicles and their turbojet power devices. Background technique [0002] Small high-speed UAVs can be used for reconnaissance, detection, attack, targeting, etc. The flying altitude is mostly below 12,000 meters, and the cruising time is relatively short, generally no more than 2 hours. At the same time, due to its special tactical purpose, it is required that the aircraft can reach the high subsonic speed of Mach 0.7-0.9 in a short time, and some supersonic types even need to fly at the supersonic speed of Mach 1.2-1.5, which puts higher demands on the power system of the aircraft. The requirements of the requirements require the engine to have the basic performance of low cost, high performance, and short life, and it must be able to achieve short-term high-thrust output...

AI Technical Summary

Problems solved by technology

However, this method still has certain limitations in the use of small UAVs: the use of the afterburner scheme requires the addition of a series of components such as the afterburner, igniter, flame stabilizer, adjustable tail nozzle, and actuating mechanism. The structure is very complicated, the weight increases; and the cost of the engine is significantly increased, especially when used on short-lived drones, the economy is extremely poor

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