题名 | Experimental investigation of the ignition process in a separated dual-swirl spray flame |
作者 | |
通讯作者 | Zhang,Chi |
发表日期 | 2020-09-01
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DOI | |
发表期刊 | |
ISSN | 0010-2180
|
EISSN | 1556-2921
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卷号 | 219页码:161-177 |
摘要 | Centrally staged lean premixed pre-evaporation combustion technology has been used in aero engines for its capability in effectively reducing NOx emissions while still providing stable flames. Previous work has shown the “ignition delay” phenomenon in the forced ignition process, revealing that the burner ignition process is complex and needs further exploration. In this work, the spark ignition and flame kernel propagation in a centrally staged optical model combustor are experimentally investigated to further illustrate the interaction between random kernel motion and flow statistics from the perspective of timescales and kernel propagations. Stochasticity involved in each individual phases of the whole ignition is obtained via repeated high-speed imaging tests. Timescales of the successful ignition processes are analyzed in a statistical method, revealing the time randomness of ignition phases. Spatial probability of the flame kernel propagation in turbulent sprays is calculated and analyzed with the combination of time-averaged flow and spray distribution. The flame projected area evolutions show that the burner ignition phase can be further divided into three phases: flame propagation, flame residence and flame growth. Three modes of ignition failure are identified during the burner ignition phase. The flame residence phase features a special period of spark ignition with low light emissions from the highly wrinkled flame kernel in the center, which is the “ignition delay” before the growth of flame. Timescales of ignition stages involve stochasticity and the flame growth phase has a higher proportion in the whole process. Statistical analysis of the flame kernel spatial position shows that in turbulent spray the flame kernel has a greater probability of propagating to the region with low axial velocity, low shear strain rate, and appropriate spray concentration. |
关键词 | |
相关链接 | [Scopus记录] |
收录类别 | |
语种 | 英语
|
学校署名 | 其他
|
资助项目 | National Natural Science Foundation of China[91641109]
; National Science and Technology Major Project[2017-III-0004-0028]
|
WOS研究方向 | Thermodynamics
; Energy & Fuels
; Engineering
|
WOS类目 | Thermodynamics
; Energy & Fuels
; Engineering, Multidisciplinary
; Engineering, Chemical
; Engineering, Mechanical
|
WOS记录号 | WOS:000564286800003
|
出版者 | |
EI入藏号 | 20202508837974
|
EI主题词 | Shear strain
; Flammability
; Aircraft engines
; Statistical methods
; Strain rate
; Probability distributions
|
EI分类号 | Flame Research:521.4
; Fluid Flow, General:631.1
; Aircraft Engines, General:653.1
; Fires and Fire Protection:914.2
; Probability Theory:922.1
; Mathematical Statistics:922.2
; Mechanics:931.1
|
ESI学科分类 | ENGINEERING
|
Scopus记录号 | 2-s2.0-85086363249
|
来源库 | Scopus
|
引用统计 |
被引频次[WOS]:45
|
成果类型 | 期刊论文 |
条目标识符 | //www.snoollab.com/handle/2SGJ60CL/140012 |
专题 | 工学院_力学与航空航天工程系 |
作者单位 | 1.National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,School of Energy and Power Engineering,Beihang University,Beijing,100191,China 2.Research Institute for Frontier Science,Beihang University,Beijing,100191,China 3.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Schenzhen,518000,China |
推荐引用方式 GB/T 7714 |
Yang,Siheng,Zhang,Chi,Lin,Yuzhen,et al. Experimental investigation of the ignition process in a separated dual-swirl spray flame[J]. COMBUSTION AND FLAME,2020,219:161-177.
|
APA |
Yang,Siheng,Zhang,Chi,Lin,Yuzhen,Xue,Xin,&Gan,Xiaohua.(2020).Experimental investigation of the ignition process in a separated dual-swirl spray flame.COMBUSTION AND FLAME,219,161-177.
|
MLA |
Yang,Siheng,et al."Experimental investigation of the ignition process in a separated dual-swirl spray flame".COMBUSTION AND FLAME 219(2020):161-177.
|
条目包含的文件 | 条目无相关文件。 |
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