Miniature gas-liquid dual-purpose high-energy igniter

Abstract

The invention relates to a micro gas-liquid dual-purpose high energy igniter, and relates to the technical field of engines. The micro gas-liquid dual-purpose high energy igniter has the advantages that 1) the success rate is increased, and the ignition lag time is shortened under the condition of relatively low ignition energy of a single igniter plug; 2) an efficient circumferential rotational flow structure can be formed in the igniter, the flue gas and flue oil retention time is prolonged, and mixing is enhanced, so that the formation of a stable flame structure is facilitated; 3) a circumferential vortex system structure is formed in a flow field, wherein the vortex system structure comprises a vortex system structure body clinging to the inside wall surface of an inner wall and a circumferential vortex system flow structure formed by entraining inner fluid by the vortex system structure body; 4) the ignition lag is reduced, the ignition success rate is increased, and the flue gasand flue oil retention time is prolonged on the premise of the smallest size of the igniter; and 5) the atomization effect can be ensured, and the fogdrop collision with a stone wall can be avoided.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a miniature gas-liquid dual-purpose high-energy igniter. Background technique [0002] Among the existing ignition devices for turbine engines, ramjet engines and gas turbines, the kerosene-air igniter refers to a combustion device that utilizes kerosene as a fuel and air as an oxidant that can eject high-temperature flames (gas). At present, the main combinations of oxidant and fuel in China are: oxygen / hydrogen, oxygen / alcohol, oxygen / kerosene, liquid oxygen / kerosene, etc. Although the above-mentioned igniters work stably and reliably, they are not suitable for scramjet engines that use kerosene as fuel. In other words, if air and kerosene can be used as the oxidant and fuel of the igniter, it will bring greater benefits, because both the igniter and the engine use kerosene as fuel, which can make the fuel supply system more integrated and safe, and save valuable load space. ...

AI Technical Summary

Problems solved by technology

[0005] 1) The characteristic size, diameter and length are large, making it difficult to apply to small turbine engines or ramjet engines;

[0006] 2) The ignition time delay is long, which may easily cause ignition failure of the power unit;

[0007] 3) The wall surface lacks thermal protection ability, which is easy to cause ablation and short working life

Images