| Title | Mechanistic Insights into Effects of Outer Stage Flare Angle on Ignition and Flame Propagation of Separated Dual-Swirl Spray Flames |
| Author | |
| Corresponding Author | Zhang Chi |
| Publication Years | 2022-08-01
|
| DOI | |
| Source Title | |
| ISSN | 1003-2169
|
| EISSN | 1993-033X
|
| Volume | 31Pages:1642-1662 |
| Abstract | The present work investigates the effects of outer stage flare angle on ignition and kernel propagation in a centrally staged optical model combustor based on the kernel dynamics analysis and laser diagnostics of flow and spray fields. Three outer stage flare angles of 8 degrees, 16 degrees, and 25 degrees are researched, respectively. The better ignition performances are found for larger outer stage flare angles. Key properties such as the kernel velocity, kernel trajectory extracted from 6 kHz high-speed flame images are analyzed in combination with the flow and spray measured via Particle Image Velocimetry (PIV) and Planar Mie Scattering (PMie). Results show that the larger outer stage flare angle imposes a larger opening angle of outer swirl jet (SWJ), shifting the vortex in outer recirculation zone (ORZ) and inner recirculation zone (IRZ) upstream. The spray distribution of a smaller flare angle exhibits a fuel-lean zone near the igniter and this is attributed to the presence of low-angle outer swirl jet that prevents the fuel droplets from arriving at the igniter vicinity. The flame kernel propagates along the path where the strain rate and velocity decrease and the spray droplet density is within the flammable limits. A lower outer stage flare angle increases the strain rate and velocity at the early phase of flame propagation, leading to a longer propagation route and thus increasing the risk of ignition failure. |
| Keywords | |
| URL | [Source Record] |
| Indexed By | |
| Language | English
|
| SUSTech Authorship | Others
|
| Funding Project | National Natural Science Foundation of China[91641109]
; National Science and Technology Major Project[2017-III-0004-0028]
|
| WOS Research Area | Thermodynamics
; Engineering
|
| WOS Subject | Thermodynamics
; Engineering, Mechanical
|
| WOS Accession No | WOS:000838481700001
|
| Publisher | |
| EI Accession Number | 20223312573668
|
| EI Keywords | Drops
; Flame research
; Flame spraying
; Flammability
; Laser diagnostics
; Strain rate
|
| ESI Classification Code | Flame Research:521.4
; Laser Applications:744.9
; Coating Techniques:813.1
; Polymer Applications:817.2
; Fires and Fire Protection:914.2
; Special Purpose Instruments:943.3
|
| Data Source | Web of Science
|
| Citation statistics |
Cited Times [WOS]:0
|
| Document Type | Journal Article |
| Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/382309 |
| Department | Department of Mechanics and Aerospace Engineering |
| Affiliation | 1.Beihang Univ, Sch Energy & Power Engn, Natl Key Lab Sci & Technol Aeroengine Aerothermod, Beijing 102206, Peoples R China 2.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518000, Peoples R China |
| Recommended Citation GB/T 7714 |
Yang Siheng,Hui Xin,Zhang Chi,et al. Mechanistic Insights into Effects of Outer Stage Flare Angle on Ignition and Flame Propagation of Separated Dual-Swirl Spray Flames[J]. Journal of Thermal Science,2022,31:1642-1662.
|
| APA |
Yang Siheng,Hui Xin,Zhang Chi,Qian Weijia,&Gan Xiaohua.(2022).Mechanistic Insights into Effects of Outer Stage Flare Angle on Ignition and Flame Propagation of Separated Dual-Swirl Spray Flames.Journal of Thermal Science,31,1642-1662.
|
| MLA |
Yang Siheng,et al."Mechanistic Insights into Effects of Outer Stage Flare Angle on Ignition and Flame Propagation of Separated Dual-Swirl Spray Flames".Journal of Thermal Science 31(2022):1642-1662.
|
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