Combustion Research Program: Flame studies, laser diagnostics, and chemical kinetics. Progress report, 15 July 1987--3 December 1990

Technical Report · Tue Jan 22 00:00:00 EST 1991

DOI:https://doi.org/10.2172/10143528· OSTI ID:10143528

Crosley, D R

We have made a detailed study of the care that must be taken to correctly measure OH radical concentrations in flames. A large part of these studies has concerned collisional quenching of hydride radical species (OH, NH, and NH{sub 2}), in particular the dependence upon rotational level and collision velocity (temperature). The results on OH and NH have shown unique and interesting behavior from the viewpoint of fundamental molecular dynamics, pointing to quenching often governed by collisions on an anisotropic, attractive surface, whereas NH{sub 2} quenching appears to depend on state-mixing considerations, not dynamic control. This state-specific behavior of these small, theoretically tractable hydrides has direct ramifications for quantitative flame diagnostics. Our other effort in the diagnostic area has been repeated but unsuccessful searches for laser induced fluorescence in the vinyl radical.

• Research Organization: SRI International, Menlo Park, CA (United States). Molecular Physics Lab.
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States); Tennessee Valley Authority, Knoxville, TN (United States)
• DOE Contract Number: FG03-86ER13571
• OSTI ID: 10143528
• Report Number(s): DOE/ER/13571-T1; ON: DE92012575
• Resource Relation: Other Information: PBD: 22 Jan 1991
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HYDROXYL RADICALS
CHEMICAL REACTIONS
METHYL RADICALS
CHEMICAL REACTION KINETICS
OXYGEN
QUENCHING
DYNAMICS
AMMONIA
PHOTOLYSIS
FORMATION HEAT
ETHYLENE
FLUORESCENCE
MULTI-PHOTON PROCESSES
PHOTOIONIZATION
FLAMES
LASER RADIATION
VINYL RADICALS
TEMPERATURE DEPENDENCE
PROGRESS REPORT
400800
COMBUSTION, PYROLYSIS, AND HIGH-TEMPERATURE CHEMISTRY