Experimental investigation on the flame propagation pattern of a staged partially premixed annular combustor

被引：0

作者：

Gao, Wei ^{[1
,2
]}

Yang, Jinhu ^{[1
,2
,3
]}

Liu, Fuqiang ^{[1
,2
,3
]}

Mu, Yong ^{[1
,2
,3
]}

Liu, Cunxi ^{[1
,2
,3
]}

Xu, Gang ^{[1
,2
,3
]}

机构：

[1] Key Laboratory of Light-duty Gas-turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing,100190, China

[2] University of Chinese Academy of Sciences, Beijing,100190, China

[3] Innovation Academy for Light-duty Gas Turbine, CAS, China

来源：

Combustion and Flame | 2021年 / 230卷

关键词：

Flammability - Schematic diagrams - Flame research - High speed cameras - Combustors - Ignition;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The transient ignition process of a staged partially premixed low-emission annular combustor was investigated experimentally in this paper. This study focused on the mechanism of injector-to-injector flame propagation. For various overall equivalence ratios and bulk velocities, a side visualization of the spreading flame captured by 10 kHz high-speed imaging technology during the light-round process illustrated that flame propagation from injector to injector presents three typical modes: spanwise-upstream, archlike-entrainment, and spanwise-entrainment, instead of following a purely azimuthal direction. The detailed processes of flame propagation with the various modes were analysed based on the flow field and spray patterns. Three schematic diagrams for the injector-to-injector flame propagation modes were established. The injector-to-injector flame propagation mode is dependent on the bulk velocity and equivalence ratio, which have a critical impact on the flow field and spray pattern as well as the subsequent flame morphology of the dome. © 2021 The Combustion Institute

引用