期刊
PROCEEDINGS OF THE COMBUSTION INSTITUTE
卷 37, 期 4, 页码 4531-4538出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.proci.2018.07.043
关键词
Partially stirred reactor; Jet-in-Hot Co-flow burner; MILD combustion; Mixing time-scale; Dynamic model
资金
- Fonds de la Recherche Scientifique - FNRS Belgium
- European Union [643134]
- European Research Council (ERC) [714605]
The present work shows an in-depth analysis about the role of mixing models on the simulation of MILD combustion using a finite-rate combustion model, the Partially Stirred Reactor approach (PaSR). Different approaches of increasing complexity are compared: a simple model based on a fraction of the integral time scale, a fractal-based mixing model and a dynamic mixing model based on the resolution of transport equations for scalar variance and dissipation rate. The approach is validated using detailed experimental data from flames stabilized on the Adelaide Jet-in-Hot Co-flow (JHC) burner at different fuel jet Reynolds numbers (5k, 10k and 20k) and different co-flow oxygen dilution levels (3%, 6% and 9%). The results indicate the major role of mixing models to correctly handle turbulence/chemistry interactions and clearly indicate the superior performances of the dynamic mixing model over the other tested approaches. (C) 2018 The Authors. Published by Elsevier Inc. on behalf of The Combustion Institute.
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