Enhancement of a laminar premixed methane/oxygen/nitrogen flame speed using femtosecond-laser-induced plasma

Journal Article · Mon Jul 05 00:00:00 EDT 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3457384· OSTI ID:21367002

Xin, Yu; Jiangbo, Peng; Yachao, Yi; Yongpeng, Zhao; Deying, Chen; Junhua, Yu ^[1]; Peng, Yang; Rui, Sun ^[2]

---

1. National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080 (China)
2. Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001 (China)

We first investigate the effects of femtosecond-laser-induced plasma on the flame speed of a laminar premixed methane/oxygen/nitrogen flame with a wide range of the equivalence ratios (0.8-1.05) at atmospheric pressure. It is experimentally found that the flame speed increases 20.5% at equivalence ratios 1.05. The self-emission spectra from the flame and the plasma are studied and an efficient production of active radicals under the action of femtosecond (fs)-laser pulses has been observed. Based on the experimental data obtained, the presence of oxygen atom and hydrocarbon radicals is suggested to be a key factor enhancing flame speed.

• OSTI ID: 21367002
• Journal Information: Applied Physics Letters, Vol. 97, Issue 1; Other Information: DOI: 10.1063/1.3457384; (c) 2010 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERIC PRESSURE
EMISSION SPECTRA
FLAMES
LAMINAR FLOW
LASERS
METHANE
NITROGEN
OXYGEN
PLASMA
PLASMA PRODUCTION
PULSES
ALKANES
ELEMENTS
FLUID FLOW
HYDROCARBONS
NONMETALS
ORGANIC COMPOUNDS
SPECTRA