Open AccessModelling of hydrogen flame in perfectly clean combustion regimes using LES-CMC
Author(s) -
Agnieszka Wawrzak,
Artur Tyliszczak
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1398/1/012016
Subject(s) - combustion , flame structure , premixed flame , laminar flame speed , hydrogen , ignition system , flame front , flame speed , water vapor , diffusion flame , oxygen , mechanics , nozzle , materials science , jet (fluid) , chemistry , thermodynamics , combustor , organic chemistry , physics
The LES coupled with the first-order CMC method and detailed chemical mechanism is used for the calculations of hydrogen jet burning in the atmosphere of water vapour and oxygen mixture. The flame is initiated by a spark, then it spreads and propagates through the domain and eventually stabilises as a lifted or attached one. Three dimensional calculations were proceeded with analysis of the flame in the mixture fraction space. The main focus of the paper is on the effect of oxidizer composition on the flame characteristics and stabilization mechanisms. The flame structure during the propagation phase is represented based on the so-called pre-ignition species. Time-averaged results show the flame lift-off distance, shape and radial size. It is found that these factors may be effectively controlled by the amount of water vapour in the co-flowing oxidizer.