High-frequency conical spiral tube type pulse detonation engine

Abstract

The invention discloses a high-frequency conical spiral tube type pulse detonation engine. A multiple-tube coaxial stacking type inverted frustum-shaped structure is adopted, and is embedded in a conical ring-shaped passage between an outer casing and an inner casing of the engine, and the conical ring-shaped passage is positioned between an oxidizer storage cavity and an isolation gas storage cavity. During work, the gas in the cavities at the two sides can be preheated by the high temperature of gas in a conical spiral detonation tube, meanwhile, the conical spiral detonation tube is cooled by the gas in the cavities to avoid burnout of the detonation tube, and the heat cycle efficiency of the engine is improved by a heat return principle. The conical spiral detonation tube is provided with a reinforcing section, the filling time of combustible mixing gas is very short, the DDT (deflagration to detonation transition) distance and time can be obviously shortened, and the working efficiency of the engine is improved. The periodic thrust is generated by the high-speed spraying of high-temperature and high-pressure gas generated by pulse detonation waves. The high-frequency conical spiral tube type pulse detonation engine has the advantages that the structure is simple, the boosting components and rotary components are saved, the size is small, and the processing is convenient.

Description

technical field [0001] The invention relates to the technical field of pulse detonation engines, in particular to a high-frequency conical helical tube type pulse detonation engine. Background technique [0002] The pulse detonation engine belongs to the unsteady state engine. It is a new concept propulsion device that uses pulse detonation waves to generate high temperature and high pressure gas and injects it at high speed to generate periodic thrust. According to whether it has its own oxidant, pulse detonation engines can be divided into air-breathing pulse detonation engines and rocket-type pulse detonation engines. [0003] In the existing conventional scale pulse detonation engine, in order to ensure the filling flow of the detonation tube, the aperture of the supply solenoid valve cannot be too small, and the large aperture solenoid valve is difficult to respond to high frequency, so the conventional scale pulse detonation is severely limited The increase in the ope...

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Problems solved by technology

[0005] In order to avoid the deficiencies of the existing technology and overcome the problems of low energy density and low operating frequency of conventional pulse detonation engines; the present invention proposes a high-frequency cone-spiral tube pulse detonation engine, which uses a cone-spiral detonation tube, The volume and axial length of the pulse detonation engine are reduced, and the energy density of the thermal power device is improved; the detonation tube of the engine is small in size and simple in structure, which can effectively shorten the fuel filling time, increase its operating frequency and the engine's Thrust-to-weight ratio

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