摘要
针对第2级径向旋流器的气量分配对点火熄火特性的影响进行了研究.试验结果表明:对于采用同向旋转强旋流的旋流杯,空气雾化喷嘴在气液比大于3后会形成稳定的液雾,在常温常压起动点火以及熄火工况下,燃烧室中的燃油已基本雾化完全.第1,2级旋流器的气量比从0.8变化至1.2后,旋流杯液滴韦伯数大于40,液滴已进行充分的二次雾化,增加第2级旋流器气量不会进一步改善雾化质量,因此对点火和熄火特性基本无影响.
The air split of the second stage of the radial swirler was taken as the main design parameter for the ignition and extinction characteristics.Test study showed that the fuel in the chamber,atomized by the co-rotating swirler cup with strong swirl number,has been basically atomized at ignition and lean blow-out conditions of atmospheric pressure and room temperature as a stable fuel atomized at the air-fuel-ratio greater than 3.The droplet had sufficient secondary atomization when the air split ratio of the primary and the second stage of swirlers changed from 0.8to 1.2,making the swirl cup droplet Weber number greater than 40.Therefore,increase of the second stage of swirler air split will not further improve the atomization quality,there is no influence on the ignition and extinction characteristics.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2016年第3期608-615,共8页
Journal of Aerospace Power
关键词
燃烧室
径向旋流器
有效面积
点火
熄火
combustor
radial swirler
effective area
ignition
extinction
