Rocket-type rotating detonation/ramjet combined engine

Abstract

The invention discloses a rocket-type rotating detonation / ramjet combined engine, and relates to a combined engine. The combined engine is provided with an air inlet passage, an expansion section, a rotating detonation rocket, a mixing section, a ramjet combustor and a tail pipe nozzle; the ramjet combustor and a rotating detonation rocket combustor are connected in series; the air inlet passage,the expansion section, the mixing section, the ramjet combustor and the tail pipe nozzle are connected in sequence; the air inlet passage and the expansion section, the expansion section and the mixing section, the mixing section and the ramjet combustor and the ramjet combustor and the tail pipe nozzle are connected by respective connecting pieces; and the rotating detonation rocket and a flame stabilizer are arranged in the mixing section. A working mode of the combined engine includes four stages: the first stage is that Mach is 0 to 2, and the rotating detonation rocket works alone; the second stage is that Mach is 2 to 3, and a joint-working mode of the rotating detonation rocket and a ramjet engine is employed; the third stage is that Mach is 3 to 4.5, and a working mode of a subsonic combustion ramjet engine is employed; and the fourth stage is that Mach is 4.5 to 7, and a working mode of a supersonic combustion ramjet engine is employed.

Description

technical field [0001] The invention relates to a combined engine, in particular to a rocket-type rotary detonation ramjet combined engine utilizing a rocket mode. Background technique [0002] The continuous rotating detonation combustor has a compact structure and is a subversive propulsion method. The rotating detonation rocket has a high specific impulse, a simple structure, and is easy to combine with a ramjet engine, meeting the requirements of a wide speed range and wide airspace combined aerospace engine . [0003] The "Perseus" missile system that MBDA and Russia are cooperating with uses a ramjet continuous rotation detonation wave engine. Researchers in Poland and Japan proposed the concept of a turbo-enhanced continuous rotating detonation engine, and believed that the engine has the advantages of high efficiency, simple design, low cost, etc., and has a good development prospect ([1] Okninski A, Marciniak B, Bartkowiak B, et al. Development of the Polish Small...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to solve the problems of low inflow pressure and low temperature of the sub-combustion ramjet combustion chamber in low Mach flight, which cause combustion instability, etc., to provide a solution that can solve the above problems, realize the flight of the aircraft in a wide speed range, and combine the engine with small size and high thrust-to-weight ratio. High, it can be used alone as a power to fly at Mach 0-7, and it can also be used as a rocket-type rotary detonation ramjet combination engine that bridges the thrust gap between the turbine and the ramjet engine when the turbine-based combined power engine is at Mach 2-3

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