Experimental Investigation of Effects of Pilot Swirl Flow Organization on Ignition and LBO Performance for a Staged Combustor

被引：0
|
作者：
Yang J.-H. [1 ,2 ]
Liu C.-X. [1 ,2 ]
Liu F.-Q. [1 ,2 ]
Mu Y. [1 ,2 ]
Xu G. [1 ,2 ]
机构：
[1] Key Laboratory of Light Duty Gas Turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing
[2] University of Chinese Academy of Sciences, Beijing
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2019年 / 40卷 / 09期
关键词：
Flow structure; Ignition; Kerosene concentration distribution; Lean blow-out;
D O I：
10.13675/j.cnki.tjjs.180729
中图分类号：
学科分类号：
摘要：
In order to effectively widen the safety operating limits of multi-swirl staged combustor, the ignition and lean blow-out (LBO) performance of a staged model combustor were experimentally acquired. Moreover, the non-reacting flow field structures and kerosene concentration distribution in the model combustor were obtained by virtue of planar laser diagnostic techniques. The effects of the design parameters of the dual swirl prefilmed air blast pilot stage (i.e. the swirl direction and the swirl intensity) on flow field structures and kerosene concentration distribution as well as combustion stability are analyzed. Based on the analyses, the inherent correlations between the ignition / lean blow-out behaviors and the flow structures and kerosene concentration are discussed and explored. Finally, conclusions are drawn that the ignition and LBO performances of this kind of staged combustor can be improved by reducing the inner swirl intensity, increasing the outer swirl intensity and designing the pilot dual swirlers with counter-rotation. The findings and conclusions from this investigation can be used in the design of the prefilmed air blast pilot stage of the staged combustor. © 2019, Editorial Department of Journal of Propulsion Technology. All right reserved.
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页码：2050 / 2059
页数：9
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