The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Strategies for Quantitative Planar Laser-Induced Fluorescence of NH Radicals in Flames

På svenska

Author

Summary, in English

Laser-induced fluorescence imaging of the NH radical using excitation in the (0-0) and (1-0) vibrational bands of the A3Π-X3Σ– electronic transition is characterized in premixed NH3-air flames. Filtered detection for excitation of the (1-0) band is found to be beneficial for measurement conditions with a challenging background and/or interferences. Concentration evaluation for excitation in the (0-0) and (1-0) bands is feasible by means of fully or partially saturated fluorescence, respectively. Detection limits of a few tens of ppm for averaged data and 100 ppm on a single-shot basis was achieved for 3-cm imaging size using both excitation alternatives. Thinning and broadening of the NH layer in a turbulent flame indicate turbulence/flame chemistry coupling, which occurred at lower turbulence levels compared with hydrocarbon combustion. Fluorescence imaging of the NH flame-front marker in such flames thus provide an experimental configuration for detailed studies of turbulence/flame chemistry interactions.

Department/s

Publishing year

2016-05-03

Language

English

Pages

529-541

Publication/Series

Combustion Science and Technology

Volume

188

Issue

4-5

Document type

Journal article

Publisher

Taylor & Francis

Topic

  • Atom and Molecular Physics and Optics
  • Energy Engineering

Keywords

  • Ammonia combustion
  • Laser-induced fluorescence
  • NH radical

Status

Published

ISBN/ISSN/Other

  • ISSN: 0010-2202