...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Fluid Flow >Investigation of mixing processes of effusion cooling air and main flow in a single sector model gas turbine combustor at elevated pressure
【24h】

Investigation of mixing processes of effusion cooling air and main flow in a single sector model gas turbine combustor at elevated pressure

机译：在高压下单个扇形模型燃气轮机燃烧器中积液冷却空气和主流混合过程的研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Mixing processes between main flow and effusion cooling air are investigated in an effusion cooled, swirl-stabilized pressurized single sector gas turbine combustor using advanced laser diagnostics. Quantitative planar laser-induced fluorescence of the hydroxyl radical (OH-PLIF) and planar laser-induced fluorescence of nitric oxide, seeded to the effusion cooling air, (NO-PLIF) are employed in the primary zone and close to the effusion cooled liner. This data is used to identify mixing events at three stages of premixed combustion, i.e. mixing before reaction, mixing during reaction and mixing after reaction. A parametric study of swirl and cooling air mass flow is conducted to investigate the mutual interaction between flame and cooling air. Within the primary zone, a significant radial asymmetry of OH concentration is observed. This asymmetry is partly explained by the presence of effusion cooling air within the unburned fresh gas, leading to lowered OH con-centration within local reaction zones and their post-flame equilibrium concentration. Near the effusion cooled liner, adiabatic mixing after reaction is the dominant process across all investigated operating conditions. Notable mixing before reaction is only observed for the first effusion hole on the center line at low swirl conditions.
机译：使用先进的激光诊断，研究了主流和积液冷却空气之间的混合过程，采用过高的激光诊断，旋流稳定的加压单扇区燃气涡轮燃烧器。定量平面激光诱导的羟基（OH-PLIF）的荧光和平面激光诱导的一氧化氮的荧光，接种到积液冷却空气，（NO-PLIF）在主要区域中使用，并且靠近积液冷却的衬垫。该数据用于识别预混合燃烧的三个阶段的混合事件，即在反应前混合，在反应期间混合并在反应后混合。进行了对涡流和冷却空气质量流量的参数研究，以研究火焰和冷却空气之间的相互作用。在主区内，观察到OH浓度的显着径向不对称性。该不对称性通过在未燃烧的新鲜气体内的积液冷却空气的存在部分解释，导致局部反应区内的OH CON-inclation及其火焰后平衡浓度。在积液冷却的衬垫附近，反应后的绝热混合是所有调查的操作条件的显性过程。在低涡流条件下仅观察到在中心线上的第一积液孔之前仅观察到反应前的显着混合。

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号