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OH与CH2O双组分平面激光诱导荧光对旋流燃烧室火焰结构与脉动特征的研究

严浩 张少华 余西龙 李飞 林鑫

严浩, 张少华, 余西龙, 李飞, 林鑫. OH与CH2O双组分平面激光诱导荧光对旋流燃烧室火焰结构与脉动特征的研究[J]. 航空动力学报, 2019, 34(4): 894-907. doi: 10.13224/j.cnki.jasp.2019.04.019
引用本文: 严浩, 张少华, 余西龙, 李飞, 林鑫. OH与CH2O双组分平面激光诱导荧光对旋流燃烧室火焰结构与脉动特征的研究[J]. 航空动力学报, 2019, 34(4): 894-907. doi: 10.13224/j.cnki.jasp.2019.04.019
Flame structure and dynamics characters investigation by OH and CH2O planar laser-induced fluorescence in the swirl combustor[J]. Journal of Aerospace Power, 2019, 34(4): 894-907. doi: 10.13224/j.cnki.jasp.2019.04.019
Citation: Flame structure and dynamics characters investigation by OH and CH2O planar laser-induced fluorescence in the swirl combustor[J]. Journal of Aerospace Power, 2019, 34(4): 894-907. doi: 10.13224/j.cnki.jasp.2019.04.019

OH与CH2O双组分平面激光诱导荧光对旋流燃烧室火焰结构与脉动特征的研究

doi: 10.13224/j.cnki.jasp.2019.04.019
基金项目: 国家自然科学基金(11672359)

Flame structure and dynamics characters investigation by OH and CH2O planar laser-induced fluorescence in the swirl combustor

  • 摘要: 介绍了利用平面激光诱导荧光(PLIF)技术对航空发动机的旋流燃烧室模型在贫燃状态下工作特性的研究。通过对OH与CH2O双组分进行同步PLIF测量,获得了不同工况下燃烧室反应区以及预热区的瞬态结构信息。应用本征正交分解(POD)方法对OH PLIF的图像进行处理,得到了旋流火焰的主要脉动模态,并通过扩展本征正交分解(EPOD)方法计算出了相应POD模态的CH2O荧光信号分布。实验结果表明:随着燃烧室热功率的增大,火焰的整体结构、脉动模式均出现了明显的变化。在火焰高度增加的同时,轴向不稳定性逐渐增强,涡核旋进(PVC)的脉动特征相对减弱。在较大的热功率下,在燃烧室的外回流区(ERZ)出现未燃烧的燃料。

     

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出版历程
  • 收稿日期:  2018-07-25
  • 刊出日期:  2019-04-28

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