NIST Time|NIST Home|About NIST|Contact NIST

HomeAll Years:AuthorKeywordTitle2005-2010:AuthorKeywordTitle

Quantitative Two-Photon LIF Imaging of CO in Flickering CH4/Air Diffusion Flames.


pdf icon Quantitative Two-Photon LIF Imaging of CO in Flickering CH4/Air Diffusion Flames. (301 K)
Everest, D. A.; Shaddix, C. R.; Smyth, K. C.

Combustion Institute/Eastern States Section. Chemical and Physical Processes in Combustion. Proceedings. Fall Technical Meeting, 1995. October 16-18, 1995, Worcester, MA, 71-74 pp, 1995.

Keywords:

combustion; carbon monoxide; diffusion flames; flickering flames; fluorescence; methane; polycyclic aromatic hydrocarbons; soot

Abstract:

Most detailed studies of chemical processes in diffusion flames have been carried out under steady flame conditions, which provide an experimentally reproducible environment for making careful profile measurements. In contrast, flickering diffusion flames exhibit a much wider range of time-dependent, vortex-flamesheet interactions, and thus they serve as an important testing ground for assessing the applicability of chemical models derived from steady flames to complex, turbulent flows. Two examples of particular interest are the production and oxidation of soot and CO. Both involve sufficiently slow chemical rates that one might expect to observe a strong sensitivity to the complex flowfields present in time-varying flames.