학술논문
两级旋流器径向间距对贫油直喷分级燃烧室流场和雾化影响的实验研究 / Experimental study on the effect of two-stage radial spacing on flow field and atomization in LDI staged combustor
Document Type
Academic Journal
Author
蔡延青; 杨晓丽; 王凯兴; 刘富强; 冷先银; 王少林; 刘存喜; 穆勇; 徐纲; CAI Yanqing; YANG Xiaoli; WANG Kaixing; LIU Fuqiang; LENG Xianyin; WANG Shaolin; LIU Cunxi; MU Yong; XU Gang
Source
实验流体力学 / Journal of Experiments in Fluid Mechanics. 37(6):15-24
Subject
Language
Chinese
ISSN
1672-9897
Abstract
主燃级旋流器与预燃级旋流器之间的径向间距是贫油直喷分级燃烧室一个非常重要的结构参数.本文利用粒子图像测速、平面激光PMie散射和粒径测量技术对3种不同径向间距条件下的流场和雾化特性进行实验研究.结果表明:在常温常压下,随着主/预燃级径向间距的增大,中心回流区由前窄后宽向前后宽度相同转变,两级间回流区不断增大;预燃级燃油锥角受径向间距影响较小,在空气压降的影响下,主燃级直喷燃油射流由向主燃级区域偏转转为向预燃级区域偏转,主油路雾化效果变差.主/预燃级径向间距为20 mm时,主油路和副油路都能获得较好的雾化效果.
The radial spacings of the primary and pilot staged swirler is an important parameter for the lean direct injection combustor.In this paper,the particle image velocimetry technology,Mie scattering technology and particle size measurement technology were used to study the cold flow and spray characteristics under three different radial spacings of the primary and pilot stage.The experimental results show that,under normal temperature and pressure,with the increase of two-stage radial spacing,the central reflux area changes from narrower in front and wider in back to the same width in front and back,the backflow zone between the two stages keeps increasing,the fuel cone angle of the pilot stage is less affected,the main stage jet deflects gradually from the main stage to the pilot stage,and the main fuel crushing effect continues to deteriorate.When the radial spacing of the two-stage is 20 mm,the atomization effect of the main fuel is the best,and the atomization effect of the secondary fuel is also good.
The radial spacings of the primary and pilot staged swirler is an important parameter for the lean direct injection combustor.In this paper,the particle image velocimetry technology,Mie scattering technology and particle size measurement technology were used to study the cold flow and spray characteristics under three different radial spacings of the primary and pilot stage.The experimental results show that,under normal temperature and pressure,with the increase of two-stage radial spacing,the central reflux area changes from narrower in front and wider in back to the same width in front and back,the backflow zone between the two stages keeps increasing,the fuel cone angle of the pilot stage is less affected,the main stage jet deflects gradually from the main stage to the pilot stage,and the main fuel crushing effect continues to deteriorate.When the radial spacing of the two-stage is 20 mm,the atomization effect of the main fuel is the best,and the atomization effect of the secondary fuel is also good.