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C2 Production and Excitation in Sooting Flames using Visible Laser Radiation : Implications for Diagnostics in Sooting Flames

Författare

Summary, in English

Swan band emission of C2. which had been produced and excited (d3x←a 3u, Δ v = 0) by focused, tunable, visible laser radiation, was studied in sooting ethylene flames. The C2signal from the sooting regions of the flames was found to be proportional to the measured volume fractions of soot, indicating laser-vaporized soot to be the source of the signal, and as such it can be used as a diagnostic tool for point measurements of the volume fraction of soot. C2emission was detected for all incident wavelengths between 485 and 540 nm, with a C2signal 1–2 orders of magnitude higher when the wavelength was tuned to a C2 resonance than when tuned to a wavelength between the Swan bands. High concentrations of laser-produced C2 and emission from C2Swan bands can, through interference effects, limit the applicability of laser diagnostic techniques to sooting flames.

Publiceringsår

1991-06-01

Språk

Engelska

Sidor

307-318

Publikation/Tidskrift/Serie

Combustion Science and Technology

Volym

77

Issue

4-6

Dokumenttyp

Artikel i tidskrift

Förlag

Taylor & Francis

Nyckelord

  • C2 Interference
  • Laser Diagnostics
  • Soot Vaporization
  • Sooting Flames

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0010-2202