Anti-backfire structure of combustion chamber

Abstract

The invention relates to an anti-backfire structure of a combustion chamber. The anti-backfire structure comprises a combustion chamber shell, an ignition plug and a fuel nozzle, wherein the fuel nozzle is arranged on the combustion chamber shell; the ignition plug is arranged at the front part of the fuel nozzle and is located in the combustion chamber; oil spraying holes are longitudinally formed in the fuel nozzle; an annular cavity is formed between the fuel nozzle and the shell; the annular cavity is of a variable cross-section structure which is characterized in that the cross-section area of the annular cavity is the smallest at the end surface of the ignition plug. According to the anti-backfire structure, a current structure is improved; the method is simple and practical; the effect is obvious; the combustion efficiency is effectively ensured; and the ignition plug is prevented from being burnt down.

Description

technical field [0001] The invention relates to an anti-backfire structure of a combustion chamber. Background technique [0002] The combustion chamber is one of the three major parts of the engine. A chemical reaction occurs in it, converting the chemical energy of the fuel into heat energy, and heating the high-pressure air after the compressor is supercharged to the allowable temperature before the turbine. Generally, the fuel is premixed with air in the ignition area of ​​the combustion chamber, and the fully premixed fuel and air in the main combustion area are ignited. When the fuel burns, the gas expands and causes the pressure to decrease instantaneously, which creates negative pressure in the area in front of the nozzle, sucks the combustion zone closer to the area in front of the nozzle, and produces backfire, causing the combustion zone to move away from the ideal position, thereby reducing the efficiency of the combustion chamber , and even burn the nozzle. C...

AI Technical Summary

Problems solved by technology

When the fuel burns, the gas expands and causes the pressure to decrease instantaneously, which creates negative pressure in the area in front of the electric nozzle, sucks the combustion area closer to the area in front of the electric nozzle, and produces backfire, causing the combustion area to move away from the ideal position, thereby reducing the efficiency of the combustion chamber , and even burn out the nozzle

Images