Ignition and Extinction Modeling of Hydrothermal Flames

DOI

10.2991/icmmct-17.2017.93How to use a DOI?

Keywords

Supercritical water oxidation, Hydrothermal flame, Fluent, Reactive flow modeling, Ignition, Extinction

Abstract

A modeling research is conducted for a coaxial hydrothermal combustor. The single eddy-dissipation model and finite-rate vs. eddy-dissipation model are used comparably. The latter is proved to be more precise to reflect the flow-reaction feature near the nozzle and able to predict the ignition and extinction temperatures. Large discrepancy between fuel and oxygen inlet velocities results to a recirculation zone in the reactor, which plays an important role in ignition and flame stability. Since the recirculation zone decrease with the increase in fuel concentration, the ignition temperature of 60% methanol is even higher than that of 30% methanol. The predicted extinction temperature is lower than the experimental data, which may be caused by the unsuitable of the chemical reaction model from the Fluent database.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Mengmeng Ren
AU  - Shuzhong Wang
AU  - Chuang Yang
PY  - 2017/04
DA  - 2017/04
TI  - Ignition and Extinction Modeling of Hydrothermal Flames
BT  - Proceedings of the 2017 5th International Conference on Machinery, Materials and Computing Technology (ICMMCT 2017)
PB  - Atlantis Press
SP  - 439
EP  - 443
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmmct-17.2017.93
DO  - 10.2991/icmmct-17.2017.93
ID  - Ren2017/04
ER  -