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高Ka 数下分子扩散效应对氨气/氢气/空气预混火焰结构的影响

Cai, Xiao LU ; Fan, Qingshuang LU ; Wang, Jinhua ; Huang, Zuohua and Li, Zhongshan LU (2022) In Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 43(8). p.2025-2032
Abstract

Simultaneous planar laser induced fluorescence (PLIF) and Rayleigh scattering thermometry (RST) were applied to measure the key species and temperature fields of premixed ammonia/ hydrogen/air jet flames to investigate the effects of differential diffusion on flame structure. NH-PLIF technique was developed to properly characterize the reaction zone of ammonia flames. Three flames with similar laminar combustion characteristics but different Lewis numbers (Le) were investigated. Results show that the reaction zone are locally thickened for all flames at high Karlovitz number (Ka). Furthermore, the reaction layer thickness increases with the Le, indicating that the differential diffusion still plays a role in the turbulent combustion... (More)

Simultaneous planar laser induced fluorescence (PLIF) and Rayleigh scattering thermometry (RST) were applied to measure the key species and temperature fields of premixed ammonia/ hydrogen/air jet flames to investigate the effects of differential diffusion on flame structure. NH-PLIF technique was developed to properly characterize the reaction zone of ammonia flames. Three flames with similar laminar combustion characteristics but different Lewis numbers (Le) were investigated. Results show that the reaction zone are locally thickened for all flames at high Karlovitz number (Ka). Furthermore, the reaction layer thickness increases with the Le, indicating that the differential diffusion still plays a role in the turbulent combustion even in the distributed reaction zone regime.

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author
; ; ; and
organization
alternative title
Effect of Differential Diffusion on the Structure of High Karlovitz Number Premixed Ammonia/Hydrogen/Air Flames
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Differential diffusion, High Ka number, Reaction zone thickness, Turbulent flame structure
in
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
volume
43
issue
8
pages
8 pages
publisher
Science Press
external identifiers
  • scopus:85136017119
ISSN
0253-231X
language
Chinese (Simplified)
LU publication?
yes
id
15e38beb-ddab-417f-9ffb-7cc42646fb1d
date added to LUP
2022-09-23 13:30:55
date last changed
2023-11-21 17:08:01
@article{15e38beb-ddab-417f-9ffb-7cc42646fb1d,
  abstract     = {{<p>Simultaneous planar laser induced fluorescence (PLIF) and Rayleigh scattering thermometry (RST) were applied to measure the key species and temperature fields of premixed ammonia/ hydrogen/air jet flames to investigate the effects of differential diffusion on flame structure. NH-PLIF technique was developed to properly characterize the reaction zone of ammonia flames. Three flames with similar laminar combustion characteristics but different Lewis numbers (Le) were investigated. Results show that the reaction zone are locally thickened for all flames at high Karlovitz number (Ka). Furthermore, the reaction layer thickness increases with the Le, indicating that the differential diffusion still plays a role in the turbulent combustion even in the distributed reaction zone regime.</p>}},
  author       = {{Cai, Xiao and Fan, Qingshuang and Wang, Jinhua and Huang, Zuohua and Li, Zhongshan}},
  issn         = {{0253-231X}},
  keywords     = {{Differential diffusion; High Ka number; Reaction zone thickness; Turbulent flame structure}},
  language     = {{chi}},
  number       = {{8}},
  pages        = {{2025--2032}},
  publisher    = {{Science Press}},
  series       = {{Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics}},
  title        = {{高Ka 数下分子扩散效应对氨气/氢气/空气预混火焰结构的影响}},
  volume       = {{43}},
  year         = {{2022}},
}