Comparison of OH radical species in n-butanol and methane diffusion flames

Constandinos M. Mitsingas, Alejandro Paz-Garcia, Dimitrios C. Kyritsis

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This paper compares the structure of n-butanol flames with the well understood and studied structure of methane flames. The fuels were studied in a coutnerflow diffusion flame configuration under different equivalence ratios and different strain rates. Laser induced fluorescence (LIF) was used to probe the structure of the flames and image major species and radical concentrations. Simulations were performed for the same conditions, and the resulting flame structures are compared with the experimental results. In order to measure OH LIF, the second harmonic of a Nd:YAG was used to pump a dye laser which produces a 284nm wavelength used to create a population inversion for OH, which then fluoresces at 308nm. The OH fluorescence is captured by an ICCD camera using a bandpass filter with a 310 nm center wavelength. Methane flames were computed using the well-established GRI30 reaction mechanism while n-butanol flames were computed using a mechanism developed by the Lawrence Livermore National Laboratory. Experimental results show that OH appears to be closer to the fuel side of the reaction sheet for both fuels. A strong chemiluminescence was observed, which at times interfered with the OH LIF signal.

Original languageBritish English
Title of host publication8th US National Combustion Meeting 2013
Number of pages6
ISBN (Electronic)9781627488426
StatePublished - 2013
Event8th US National Combustion Meeting 2013 - Park City, United States
Duration: 19 May 201322 May 2013

Publication series

Name8th US National Combustion Meeting 2013


Conference8th US National Combustion Meeting 2013
Country/TerritoryUnited States
CityPark City


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