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research-article

EXPERIMENTAL INVESTIGATION OF SPRAY AND COMBUSTION PERFORMANCES OF A FUEL-STAGED LOW EMISSION COMBUSTOR PART I: EFFECTS OF MAIN SWIRL ANGLE

[+] Author and Article Information
Cunxi Liu

Key Laboratory of Light-duty Gas-turbine, Institute of Engineering Thermophysics, Chinese Academy of Science, Beijing, 100190, China; Institute of Qingdao Light-duty Gas-turbine, Qingdao, 266000, China
liucunxi@iet.cn

Fuqiang Liu

Key Laboratory of Light-duty Gas-turbine, Institute of Engineering Thermophysics, Chinese Academy of Science, Beijing, 100190, China; Institute of Qingdao Light-duty Gas-turbine, Qingdao, 266000, China
liufuqiang@iet.cn

Jinhu Yang

Key Laboratory of Light-duty Gas-turbine, Institute of Engineering Thermophysics, Chinese Academy of Science, Beijing, 100190, China; Institute of Qingdao Light-duty Gas-turbine, Qingdao, 266000, China
yangjinhu@iet.cn

Yong Mu

Key Laboratory of Light-duty Gas-turbine, Institute of Engineering Thermophysics, Chinese Academy of Science, Beijing, 100190, China; Institute of Qingdao Light-duty Gas-turbine, Qingdao, 266000, China
muyong@iet.cn

Chunyan Hu

Key Laboratory of Light-duty Gas-turbine, Institute of Engineering Thermophysics, Chinese Academy of Science, Beijing, 100190, China; Institute of Qingdao Light-duty Gas-turbine, Qingdao, 266000, China
huchunyan@iet.cn

Gang Xu

Key Laboratory of Light-duty Gas-turbine, Institute of Engineering Thermophysics, Chinese Academy of Science, Beijing, 100190, China; Institute of Qingdao Light-duty Gas-turbine, Qingdao, 266000, China
xug@iet.cn

1Corresponding author.

ASME doi:10.1115/1.4037451 History: Received July 12, 2016; Revised June 19, 2017

Abstract

A fuel-staged low emission combustor in the framework of lean-burn combustion is developed in the present study. In lean-burn combustors, the swirling main air naturally tends to entrain the pilot flame and quench it at low power conditions, which is adverse to the operability specifications, such as ignition, lean blow-out, and high-altitude relight. In order to investigate the effects of the main swirl angle on combustion performances, the ignition and lean blow-out performances were evaluated in a single dome rectangular combustor. Furthermore, the spray patterns and flow field are characterized by laser diagnostic and numerical method to provide insight into spray and combustion performances. Flow-flow interactions between pilot and main air streams, spray-flow interactions between pilot spray and main air streams, and flame-flow interactions between pilot flame and main air streams are comprehensively analyzed. The physical mechanism behind the ignition and lean blow-out combustion phenomena are given.

Copyright (c) 2017 by ASME
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