Combustion and exhaust emission characteristics of low swirl injector
Combustion and exhaust emission characteristics of low swirl injector
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DOI：
10.1016/j.applthermaleng.2016.08.169
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发表时间：
2017-01
影响因子：
6.4
通讯作者：
Yangbo Deng;Hongwei Wu;F. Su
中科院分区：
文献类型：
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作者：
Yangbo Deng;Hongwei Wu;F. Su
对低旋流喷油器的燃烧和排放特性进行了实验研究。对不同旋流数、不同燃料组成条件下的低旋流预混燃烧火焰结构、温度分布和排放特性进行了试验研究。为了定性分析火焰结构，采用粒子图像测速技术（PIV）测量了通过LSI的非反应流的速度分布。实验结果表明：（i）LSI可以产生由四簇火焰连接在一起组成的蓝色“W”型火焰，并且支撑长的黄色脉动火焰，（ii）蓝色火焰结构将“W”型火焰转换为“扫帚”型火焰，并且火焰前部与喷嘴之间的距离随着旋流数的增加而缩短，（3）蓝火焰的温度分布存在双峰高温区，而黄色脉动火焰的温度分布较高;（4）LSI的NOx和CO排放水平主要取决于气体成分和热负荷。
The present experimental study aims to investigate the combustion and emission characteristics of the flow through a low swirl injector (LSI). An experimental study was carried out on the flame structure, the temperature distribution and the exhaust emission of low swirl pre-mixed combustion under the condition of different swirl number and different fuel composition. In order to qualitatively analyze the flame structure, the velocity distribution of the non-reacting flow through the LSI was measured using the particle image velocimetry (PIV) technique. Experimental results indicated that: (i) the LSI can generate a blue lift-off “W” type flame which consists of four clusters of flames connected together and holds up a long yellow pulsating flame, (ii) the blue flame structure converts the “W” type flame into the “broom” type flame and the distance between the front of the flame and the nozzle shortens with increasing swirl number, (iii) there exist high temperature region flanked by two peaks on the temperature profiles in the blue flame while uniform higher temperature in yellow pulsating flame, (iv) the NOx and CO emission level of the LSI mainly depends on the gas composition and thermal load.