Combustion pursuing device

Abstract

The invention relates to a combustion pursuing device, which comprises a closed pipeline body, barriers and ignition devices, wherein the barriers inside the pipeline body divide the pipeline body into a plurality of division areas; one-way air intake pipelines are connected into the pipeline body from the wall surface of the pipeline body; a premixed fuel is sprayed into each division area of the pipeline body through each one-way air intake pipelines; different positions in the pipeline body are provided with one or more groups of the ignition devices which are used for igniting the premixed fuel for combustion, and a plurality of groups of ignitions can be synchronous or asynchronous; the wall surface of each division area of the pipeline body is provided with flame outlets which are used for outputting flames and exhausting burnt gasses and can output one ro more groups of the flames. The combustion pursuing device has a simple structure and strong functions, can meet requirements on high-frequency and high-energy ignitions, and overcomes the difficulties in continuous ignition and the conversion from deflagration to detonation, and simultaneously the arrangement of the flame outlets can hardly be influenced by geometrical factors and has flexibility beyond comparison. The combustion pursuing device can be used as an ignition device and a device which needs high-frequency and high-energy ignition of a pulse detonation engine, and is applied in the fields of electric power, motive power or aerospace and the like.

Description

technical field [0001] The invention relates to a combustion catch-up device. It can be used as an ignition device for a pulse detonation engine or where high-frequency, high-energy ignition is required, and it can be used in fields such as electric power, power or aerospace. Background technique [0002] The present invention stems from the discovery of a similar need for pulse detonation engine ignition. [0003] It is generally believed that the development of engines has roughly experienced two major historical stages. The first stage was before 1950, mainly the use of piston engines. In the second stage, after World War II, the turbo engine developed rapidly and has always occupied the dominant position. It has many variants, such as turbofan engine, turboprop engine, turboshaft engine, etc., but its core technology is compressor- Combination of turbines, i.e. gas turbines. [0004] It was asked very early on whether there will be a follow-up model after the turbo en...

AI Technical Summary

Problems solved by technology

But it is still very immature, and it faces many technical challenges. At present, almost all pulse detonation engine designs have huge noise, and the operating frequency is obviously difficult to keep up with.

The working frequency refers to the detonation combustion frequency. It takes about 100 Hz to generate enough specific impulse. If this frequency cannot be reached, the specific impulse is not enough, and it is not competitive with the turbine.

Imagine that in a cavity, the exhaust and intake go back and forth more than a hundred times a second, and there is no piston to push the gas out, and only rely on the expansion process to fill, explode, refill, and explode again, which in itself is very difficult

In addition, because the generation and triggering of the detonation wave requires a high temperature and high pressure triggering environment, many researches and designs are aimed at this, such as the shock wave focusing method, the jet ejection detonation method, the step detonation method, and the extended detonation tube How to effectively break through the bottleneck of the DDT process (Defiagration to Detonation Transition) is a problem that has not yet been well resolved.

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