摘要
采用粒子图像测速仪对一个带多点贫油直接喷射双环预混旋流燃烧室头部的低污染燃烧室油雾场进行了测量,试验研究不同燃油喷射方式时燃油流量变化对油雾特性的影响.结果表明:在试验工况下,粒径40μm左右的油珠数目最多,大于或小于此粒径的油珠数目都较少;单开值班级喷嘴时,随着燃油流量增加,燃油雾化变差;单开主燃级喷嘴时,增加燃油流量使燃油雾化稍有改善.同时打开值班级和主燃级喷嘴,保持油气比不变时,值班级和主燃级燃油量分配比例改变对燃油雾化特性的影响不大.
A particle image velocimetry （PIV） was employed to measure fuel spray fields of the TAPS/MLDI （twin annular premixing swirler/multipoint lean direct injection） low e- mission combustor under different inlet conditions. The influences of different fuel flow rates with various fuel injection fashions on fuel spray characteristic of the low emission com- bustor were experimentally investigated. Results show that. the number of droplet with the size of 40μm reaches maximum under experimental conditions. The number of droplet, which is larger or smaller than the droplet size of 40μm, harply decreases. When the pilot fuel atomizer is operated, the fuel atomization is worsened with the increase of the fuel flow rate. When the primary fuel injector is operated, the fuel atomization is slightly improved with the increase of the fuel flow rate. When the pilot and primary atomizer are operated at the same time, the inlet fuel air ratio is the same, and the effect of the decrease of primary fuel flow rate and increase of pilot fuel flow rate on the fuel atomization is weak.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2012年第11期2421-2428,共8页
Journal of Aerospace Power
基金
国家自然科学基金(50906040)
中央高校基本科研业务费用专项资金(N22012107)
关键词
多点燃油直接喷射
双环预混旋流低污染燃烧室
粒子图像测速仪
油雾特性
燃油雾化
multipoint lean direct injection （MLDI）
twin annular premixing swirler （TAPS） low emission combustor
particle image velocimetry （PIV）
fuel spray characteristic
fuel atomization
