@inproceedings{,
    author = {Breda, Paola; Fischer, Lukas; Dalshad, Rahand; Pfitzner, Michael},
    title = {Numerical investigation of auto-ignition length and wall heat flux for near-wall reaction of CH4},
    editor = {},
    booktitle = {Deutscher Flammentag (30., 2021, Hannover-Garbsen)},
    series = {},
    journal = {},
    address = {},
    publisher = {},
    edition = {},
    year = {2021},
    isbn = {},
    volume = {},
    number =  {},
    pages = {1-10},
    url = {},
    doi = {},
    keywords = {},
    abstract = {Reactive Large Eddy Simulations (LES) with direct integration of chemistry are presented in this work
for the numerical investigation of a novel test bench developed at the Bundeswehr University of Munich.
The experimental setup aims to investigate secondary near-wall reactions caused by cold fuel injection
into a hot crossflow and it provides measurements of OH-PLIF, OH* and reconstructed wall heat fluxes
for comparison with numerical computations. Here the experimental configuration with methane as fuel
and an impulse ratio of 10 is investigated. The effect of chemistry is investigated using two reduced
chemical mechanisms with 19 and 30 species, respectively. Two meshes including one and three fuel
injector nozzles are considered, to investigate the jet-to-jet interaction. Four inlet temperatures for the
hot flows are investigated, to estimate the sensitivity of the autoignition length to a variation of the hot
inlet temperature. The results show that the autoignition length estimated from the OH and CH2O
concentrations is strongly dependent on the temperature of the hot reactants and that chemistry is the
driving factor to trigger autoignition in the chosen configuration. A qualitatively good approximation
with the experimental autoignition length is obtained with a hot inlet temperature of 1600-1620 K. The
numerical wall heat flux does not predict the local peak due to the reaction zone close to the wall, but
the order of magnitude of the experiment is reached.},
    note = {},
    institution = {Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik, LRT 10 - Institut für Thermodynamik, Professur: Pfitzner, Michael},
    
    
}