Studies of the effects of radical quenching and flame stretch on mesoscale combustion

Yiguang Ju, Bo Xu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

The effect of radical quenching on the flame propagation and extinction limit in meso and microscale channels is investigated numerically using a three-step kinetic mechanism. The results showed that at low wall temperatures and large channel widths, the thermal quenching is a dominant mechanism for flame extinction. However, with the increase of the wall temperature and the reduction of the chain-branching temperature, radical quenching becomes an important or dominant mechanism in affecting flame speed, flame structure, and extinction limit. The results also show that the increase of flow velocity enhances the radical quenching effect. In addition, it is found that there are two different radical quenching regimes, the diffusion limited regime and the kinetic limited regime. It is shown that the decrease of radical Lewis number significantly reduces the flame speed and narrows the extinction limit. Moreover, the results also demonstrate that at high flow velocities, the radical quenching in microscale combustion can lead to a radical quenching induced extinction limit.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages16313-16318
Number of pages6
ISBN (Print)1563478072, 9781563478079
DOIs
StatePublished - 2006
Event44th AIAA Aerospace Sciences Meeting 2006 - Reno, NV, United States
Duration: Jan 9 2006Jan 12 2006

Publication series

NameCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
Volume21

Other

Other44th AIAA Aerospace Sciences Meeting 2006
CountryUnited States
CityReno, NV
Period1/9/061/12/06

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

Fingerprint Dive into the research topics of 'Studies of the effects of radical quenching and flame stretch on mesoscale combustion'. Together they form a unique fingerprint.

Cite this