CAJ | 학술논문

利用OH平面激光诱导荧光技术，测量了双旋流燃油燃烧器扩散火焰特征，考察了不同当量比下火焰内部的OH摩尔浓度分布．应用FLUENT软件进行了数值分析，并将模拟结果与实验结果进行了比较，分析了不同当量比下，双旋流燃烧器柴油扩散火焰的结构特点与流场间的关系．结果表明，在双旋流燃烧器中，火焰出现在内外旋流器两股射流间的低速区域内；在燃料量不变、进气量加大的情况下，当量比低于0.38时，由于径向速度沿径向持续增大，导致火焰锋面被剪成前后两段；随着当量比的增大，火焰张角没有明显变化，但是燃烧区域显著增大.
이용OH평면격광유도형광기술，측량료쌍선류연유연소기확산화염특정，고찰료불동당량비하화염내부적OH마이농도분포．응용FLUENT연건진행료수치분석，병장모의결과여실험결과진행료비교，분석료불동당량비하，쌍선류연소기시유확산화염적결구특점여류장간적관계．결과표명，재쌍선류연소기중，화염출현재내외선류기량고사류간적저속구역내；재연료량불변、진기량가대적정황하，당량비저우0.38시，유우경향속도연경향지속증대，도치화염봉면피전성전후량단；수착당량비적증대，화염장각몰유명현변화，단시연소구역현저증대.
The flame structures of diesel diffusion flame on a dual-swirl burner are observed by using OH-PLIF method at different equivalence ratio. FLUENT is used to analyze the fluid and OH distribution,and then the compu-tation results are compared with the experimental ones. The results show that,in the dual-swirl burner,the flame is located in the low velocity zone between two jet flows,that with constant amount of fuel and increasing amount of inlet air,the flame is cut into two when the equivalence ratio is lower than 0.38,and that with decreasing equivalent ratio,the angle of flame remains almost the same,while the combustion zone increases remarkably.