195
Views
23
CrossRef citations to date
0
Altmetric
Original Articles

TEMPERATURE AND CO CONCENTRATION MEASUREMENTS IN A PARTIALLY PREMIXED CH4/AIR COFLOWING JET FLAME USING COHERENT ANTI-STOKES RAMAN SCATTERING

, , &
Pages 1965-1984 | Received 01 Jan 2003, Accepted 01 Apr 2004, Published online: 11 Aug 2010
 

Abstract

In a partially premixed methane/air flame, temperature and CO concentration measurements were conducted using coherent anti-Stokes Raman spectroscopy. Additionally, qualitative two-dimensional OH laser-induced fluorescence imaging was applied. Measurements were performed at different positions downstream of the burner's exit for equivalence ratios (φ) between 1.7 and 4.0. A distinct double-flame structure was observed. Accurate temperature and CO concentration results were achieved, even under sooting conditions. Temperature measurements close to the burner (5 mm downstream) indicated a temperature peak of 2000 K while further downstream at 10 and 20 mm a high-temperature plateau could be found. The CO concentration increases with decreasing φ starting below a particular threshold value. It was a maximum at the inner flame due to the formation of CO as a result of partial combustion. The maximum CO is found to be greater than that in a diffusion flame. The maximum CO concentration has been found for φ = 1.7, the upper ignition limit for CH4/air mixtures. OH measurements indicate that OH is mainly formed in the outer flame and is consumed there by reactions with CO and H2 diffusing from the inner flame.

The authors gratefully acknowledge financial support of parts of this work by Deutsche Forschungsgemeinschaft and by Volkswagen-Stiftung. Alexander von Humboldt Stiftung, Germany, supported A. Datta for his research stay at LTT-Erlangen where this work was conducted. The LIF measurements were performed by Volker Wagner.

Log in via your institution

Log in to Taylor & Francis Online

PDF download + Online access

  • 48 hours access to article PDF & online version
  • Article PDF can be downloaded
  • Article PDF can be printed
USD 61.00 Add to cart

Issue Purchase

  • 30 days online access to complete issue
  • Article PDFs can be downloaded
  • Article PDFs can be printed
USD 1,493.00 Add to cart

* Local tax will be added as applicable

Related Research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.