Lean blowout model for concentric staged low emission combustor

被引：0
|
作者：
Xiao W. [1 ]
机构：
[1] Hunan Aviation Powerplant Research Institute, Aero Engine Corporation of China, Hunan, Zhuzhou
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2023年 / 38卷 / 05期
关键词：
combustor; concentric staged; lean blowout; low emission; turbulent exchange;
D O I：
10.13224/j.cnki.jasp.20220491
中图分类号：
学科分类号：
摘要：
With an aim to develop a prediction model and obtain the key factors influencing the lean blowout limits in concentric staged combustors， experimental and theoretical investigations were conducted based on the flame blowout process inside a gas turbine combustor. The influences on the lean blowout limits of combustor geometry， atomization and conditions were investigated， and a method to optimize the flame stability performance was also proposed. An improved prediction model of the lean blowout limits was developed and validated. It was found that the co-swirl led to the larger recirculation zone， lower recirculated velocity and longer resistance time compared with counter-swirl， resulting in weak turbulent exchange between pilot and main flame. Consequently，the lean blowout performance of co-swirl flame was better than the counter-swirl flame. The maximum error of 20% was validated by comparing the annular and single dome combustor experimental data with the lean blowout model，which can be used in the stage of primary design of combustors. © 2023 BUAA Press. All rights reserved.
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页码：1038 / 1046
页数：8
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