Effect of swirl number on lean premixed combustion characteristics

被引：0
|
作者：
Xu L. [1 ]
Liu K. [2 ]
Zeng W. [2 ]
机构：
[1] School of Mechanical Engineering, Shenyang Ligong University, Shenyang
[2] School of Aero-engine, Shenyang Aerospace University, Shenyang
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2023年 / 38卷 / 06期
关键词：
emission index; lean blowout; lean premixed combustion; outlet temperature; swirl number;
D O I：
10.13224/j.cnki.jasp.20210675
中图分类号：
学科分类号：
摘要：
The effects of swirl numbers on the combustion performance of lean premixed combustor were studied by means of numerical simulation and experiment. The numerical simulation results showed that when the swirl number was between 0.56− 0.73，an obvious recirculation zone can be generated at the head of the flame barrel. With the increase of swirl number，the scale of recirculation zone increased，but the fuel mixing uniformity became worse，and the non-uniformity of the main combustion zone decreased from 0.008 53 to 0.010 47，which was not conducive to the improvement of the uniformity of temperature field and the reduction of NOx emission. The experiment results showed that with the increase of swirl number， the lean blowout fuel-air ratio decreased， the smaller inlet Mach number indicated the more obvious trend，the outlet temperature distribution factor increased from 0.164 0 to 0.191 5，the uniformity became worse，the emission index of CO decreased from 26.23 g/kg to 18.07 g/kg，the emission index of UHC decreased from 12.55 g/kg to 9.21 g/kg，and the emission index of NOx increased from 0.609 g/kg to 0.850 g/kg. © 2023 BUAA Press. All rights reserved.
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页码：1292 / 1298
页数：6
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