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Title: Ignition and Lean Blowout Characteristics of a Reverse-Flow Combustor for an Ultra-Compact Gas Turbine Engine
题目：一种超紧凑燃气涡轮发动机回流燃烧室的点火和熄火特性
Authors: JIN Yi, HUANG Yakun, YAO Kanghong, ZHANG Kai, WANG Yunbiao, WANG Donghao
作者：金义，黄亚坤，姚康鸿，张凯，王云飙，王东浩
单位：南京航空航天大学，南京理工大学，低碳航空动力教育部工程研究中心
Journal of Thermal Science, 2024, 33(5): 1897-1906.
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摘要
Abstract: The flame stability limit and propagation characteristics of a reverse-flow combustor without any flame-stabilized device were experimentally investigated under room temperature and pressure. The results indicate that it is feasible to stabilize the flame in the recirculation zones constructed by the impact jet flow from the primary holes and dilution holes. The flame projected area is mainly distributed in the recirculation zone upstream of the primary holes, whose presence and absence mark the ignition and extinction. During the ignition process, the growth rate and value of the flame projected area first increase and then decrease with the inlet velocity increasing from 9.4 m/s to 42.1 m/s. A rapid reduction followed by a slow reduction of ignition and lean blowout equivalence ratios is achieved by the increased inlet velocity. Then the non-reacting fluid structure in three sections was measured, and detailed velocity profiles were analyzed to improve the understanding of the flame stabilization mechanism. The results are conducive to the design of an ultra-compact combustor.
摘要：对无火焰稳定装置的逆流燃烧室的火焰稳定极限和传播特性在室温和常压下进行了实验研究。结果表明，通过主燃孔和掺混孔的空气射流构建的回流区稳定火焰的方案是可行的。火焰投影主要分布在主燃孔上游的回流区，该区域是否存在火焰是评价点火成功和熄火的标志。在点火过程中，随着入口速度从9.4 m/s增加到42.1 m/s，火焰投影面积的增长率和数值先增加后减少。随着入口速度的增加，点火和贫油熄火当量比先迅速减少，然后缓慢减少。此外，测量了三个截面内的无反应流的流场结构，并分析了详细的速度分布，以提高对火焰稳定机制的理解。研究结果有助于超紧凑燃烧室的设计。
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引用格式
JIN Yi, HUANG Yakun, YAO Kanghong, ZHANG Kai, WANG Yunbiao, WANG Donghao, Ignition and Lean Blowout Characteristics of a Reverse-Flow Combustor for an Ultra-Compact Gas Turbine Engine, Journal of Thermal Science, 2024, 33(5): 1897-1906.
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