常规结构和“腔中腔”结构的涡轮级间燃烧室数值模拟  

Numerical Simulation Investigation of "Cavity in A Cavity" Structure of Inter-Turbine Burner

作　　者：骆广琦[1] 胡磊[1] 李晓勇[2] 张海明[1] 孟龙[1] 

机构地区：[1]空军工程大学工程学院,陕西西安710038 [2]空军工程大学科研部,陕西西安710051

出　　处：《空军工程大学学报（自然科学版）》2011年第4期5-9,共5页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：空军工程大学学术创新基金资助项目(XS1011004)

摘　　要：利用流体计算软件模拟涡轮级间燃烧室(ITB)三维两相燃烧流场,研究了常规结构收集涡和腔中腔(CIAC)结构收集涡的ITB燃烧和流场变化规律。湍流模型采用可实现k-ε模型模拟,燃烧模型采用非预混平衡化学反应模型,并对2种不同结构ITB模型的温度、流场、组分等进行了分析和比较。结果发现2种结构的ITB燃烧室可以很明显地提高低压涡轮进口速度及进口温度,周向腔内前半段温度要高于后半段,主流通道下游参与二次燃烧的燃料为未完全燃烧氧化的低碳化和物。"腔中腔"结构的ITB燃烧更充分,温升更大,顶部凹槽具有明显增强火焰稳定性的作用。The difference between general trapped vortex combustion and CIAC （cavity in a cavity）trapped vortex combustion of ITB （Inter- Turbine Burner） 3 -D eombustor on two phase combustion flow field and combustion performances are studied by using CFD software. Realizable model is applied to simulating the turbulence. Nonpremixed combustion model is used to model the turbulence - chemistry interaction. Then, the analysis and comparison of the temperatures, flow field and species are done in the two different ITB structures. It is found that the ITB of the two structures can yield a substantial increase in the entrance temperature and speed of low - pressure turbine by the results. The temperature of the front half section is higher than that of the rear half section in the circumferential cavity. The fuel participating in the secondary burning in the downstream of the main path way is an incomplete burnt, incomplete oxidized low carbon compound. A fuller combustion and a greater temperature rise are obtained in CIAC （ cavity in a cavity） structure. The groove on the top has a well effect on stability of combustion.

关 键 词：涡轮级间燃烧室 腔中腔结构 非预混燃烧 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]