Combined cycle engine

Abstract

The invention provides a combined cycle engine. The combined cycle engine comprises a supersonic air inlet mechanism, a continuous rotation detonation engine body and a turbojet engine body, wherein the supersonic air inlet mechanism is provided with a first gas inlet which communicates with the outside and is opened in the axial direction, and the continuous rotation detonation engine body and the turbojet engine body are fixedly connected to the lower portion of the supersonic air inlet mechanism. The continuous rotation detonation engine body and the turbojet engine body both communicate with the supersonic air inlet mechanism in a controlled mode in order to work in the mode that external gas is introduced into the continuous rotation detonation engine body and the turbojet engine body through the first gas inlet in the controlled mode. According to the combined cycle engine, mode transition can be completed within an operating envelope range, the stable thrust is provided for an aircraft, and then the aircraft hypersonically flies at 5.0 Mach or above in the atmosphere and can land and take off horizontally; in addition, the specific impulse of the engine is improved on the basis of adopting the continuous rotation detonation technique, the combustion heat efficiency is improved, and the economy and the reliability of the engine are improved.

Description

technical field [0001] The invention relates to the technical field of aerospace power, in particular to a combined cycle engine. Background technique [0002] Near-space hypersonic vehicles with a maximum flight speed of around Mach 5.0 have advantages such as superior high-altitude and high-speed characteristics, flexible maneuverability, and high penetration probability, and have very important potential military value. In addition, with the advancement of missile defense technology, the penetration and survivability of traditional missiles are also greatly threatened, and there is an urgent need to improve mobility through high-speed propulsion devices. However, this type of aircraft has the characteristics of wide working envelope and complex and changeable flight conditions. It is difficult for a single type of propulsion device to complete all the work requirements independently. Therefore, combined power technology emerged as the times require and quickly attracted p...

AI Technical Summary

Problems solved by technology

However, this type of aircraft has the characteristics of wide working envelope and complex and changeable flight conditions. It is difficult for a single type of propulsion device to complete all the work requirements independently. Therefore, combined power technology emerged as the times require and quickly attracted people's attention

The two types of combined cycle engines that are currently being studied are the rocket ramjet combined cycle engine and the turbo ramjet combined cycle engine. The former is not economical because it does not effectively use the oxygen in the atmosphere, and it is currently difficult to meet the requirements of repeated use. For the latter, The biggest problem is the mode conversion. The maximum operating Mach number of the turbine engine is lower than the effective starting Mach number of the ramjet engine, so that when the combined engine switches from the turbine mode to the ramjet mode, the thrust cannot meet the requirements.

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