- Author
- Norton, T.S. | Smyth, K. C.
- Title
- Laser-Induced Fluorescence of CH in a Laminar CH4/Air Diffusion Flame: Diagnostic Issues and Chemical Rate Analysis.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Report
- Session A-3,
- Book or Conf
- Combustion Institute/Eastern States Section. Chemical and Physical Processes in Combustion. Fall Technical Meeting, 1990. December 3-5, 1990, Orlando, FL, 24/1-4 p., 1990
- Keywords
- lasers | fluorescence | laminar flames | diffusion flames | air
- Abstract
- The CH radical is involved in a wide range of combustion processes by virtue of its rapid addition and abstraction reactions with numerous species. Many measurements of CH fluorescence in premixed flames have been made by laser excitation of the [equation], and [equation] electronic states. In addition, several imaging studies have been carried out in turbulent diffusion flames, in which CH fluorescence has been used as a marker of the reaction zone. This interpretation is largely based upon results obtained in premixed flames. However, no data have yet been reported for the logical intermediate case of a laminar diffusion flame. In the present study relative CH concentrations are reported for a well characterized, laminar methane/air diffusion flame in which extensive measurements of species concentrations, temperature, and velocity have been carried out. Our attention is focussed on two areas: (1) interpretation of CH imaging measurements in turbulent diffusion flames and (2) identification of the most important production and destruction processes for CH in a laminar diffusion flame environment.