Numerical Investigation on Mixing Characteristics in Quenching Zone of Annular RQL Combustors

DOI

10.2991/icismme-15.2015.129How to use a DOI?

Keywords

RQL; mixing characteristics; momentum flux ratio; mixing uniformity .

Abstract

RQL (Rich burn-Quench-Lean burn) combustion technology is one of the most promising ways to control NOx emissions for gas turbines, and it calls for an extremely quick and effective quenching process to realize. This study focuses on the influencing factors of the mixing characteristics including the quenching jet as well as mainstream flow velocity and the configuration of the quenching unit through numerical simulation. Especially, their effects on the mixing uniformity are discussed. The results show that, mixing performance is mainly determined by the momentum flux ratio of the quenching flow to mainstream flow, more momentum flux the quenching air gets, deeper will the jet arrives into the mainstream. The mixing uniformity is better for higher quenching jet velocity or lower mainstream velocity cases. Besides, slots can provide more uniform mixing than the simple round holes.

Copyright

© 2015, 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  - Yongbin Ji
AU  - Ronghai Mao
AU  - Yongwen Yuan
AU  - Suhua Shen
AU  - Bing Ge
PY  - 2015/07
DA  - 2015/07
TI  - Numerical Investigation on Mixing Characteristics in Quenching Zone of Annular RQL Combustors
BT  - Proceedings of the First International Conference on Information Sciences, Machinery, Materials and Energy
PB  - Atlantis Press
SP  - 626
EP  - 633
SN  - 1951-6851
UR  - https://doi.org/10.2991/icismme-15.2015.129
DO  - 10.2991/icismme-15.2015.129
ID  - Ji2015/07
ER  -