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首页> 外文会议>ASME Power Conference 2005: Includes Papers from the 2005 International Conference on Power Engineering(ICOPE) pt.A >FLOW AND THERMAL STRUCTURE OF BURNER-WAKE STABILIZED ELLIPTIC JET FLAMES IN A CROSS-FLOW
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FLOW AND THERMAL STRUCTURE OF BURNER-WAKE STABILIZED ELLIPTIC JET FLAMES IN A CROSS-FLOW

机译：横流燃烧器-尾迹稳定椭圆形射流的流动和热结构

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摘要

This study was conducted to delineate the coupling effects of the elliptic geometry of the burner and a crossflow on the combustion of gas jets. This paper presents the flow and thermal structure of burner-wake stabilized turbulent propane jet flames from circular (diameter=0.45 cm) and elliptic (major axis/minor axis=3) burners of equivalent exit area in a crossflow of air. The elliptic burner was oriented with its major axis or minor axis aligned with the crossflow. Experiments were conducted in a wind tunnel provided with optical and probe access. Flame structure data including temperature profiles and concentration profiles of CO_2, O_2, CO, and NO were obtained in the single flame configuration (at jet to crossflow momentum flux ratio = 0.0067), where a planar recirculation zone exists completely stabilized in the wake of the burner tube. This study is complementary to our previous study with a two-zone structure flame at jet/crossflow momentum flux ratio of 0.11. Results show that in this flame configuration, the peak NO concentration in the circular burner is higher than that in the elliptic burner flames. Carbon monoxide concentration was approximately same in the flame with circular burner and the elliptic burner with its major axis aligned with cross-flow; the CO concentration in the elliptic flame with the minor axis of the burner aligned with cross-flow was slightly smaller.
机译：进行这项研究是为了描述燃烧器的椭圆形几何形状和横流对气体射流燃烧的耦合作用。本文介绍了在空气横流下，等效出口面积的圆形（直径= 0.45 cm）和椭圆形（长轴/短轴= 3）燃烧器的燃烧器尾迹稳定的湍流丙烷喷射火焰的流动和热结构。椭圆燃烧器的长轴或短轴与横流对齐。实验是在具有光学通道和探头通道的风洞中进行的。在单火焰构型（射流与横流动量通量比= 0.0067）下获得了包括温度分布图和CO_2，O_2，CO和NO浓度分布图的火焰结构数据，其中平面回流区在尾流之后完全稳定了。燃烧器管。这项研究是对我们先前研究的补充，该研究具有喷射/横流动量通量比为0.11的两区域结构火焰。结果表明，在这种火焰配置下，圆形燃烧器的峰值NO浓度高于椭圆形燃烧器的火焰。圆形燃烧器和椭圆燃烧器的一氧化碳浓度在火焰中大致相同，其长轴与横流对齐；椭圆形火焰中燃烧器的短轴与错流对齐的CO浓度略小。

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