Experimental and computational imaging of mid-infrared radiation from a turbulent ethylene flame

Harshad U. Lalit, Robert K. Kapaku, Brent A. Rankin, Michael Edward Mueller, Jay P. Gore

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Quantitative Imaging of Radiation Intensity (QIRI) was utilized to study time dependent radiation intensity from major product species in an ethylene-air turbulent non-premixed luminous flame. The flame was stabilized on a jet burner (8 mm inner diameter) identical to that used for the DLR-A flame of the TNF workshop. The fuel flow rate was selected to yield a Reynolds number of 15, 200, which is identical to that of the DLR-A flame. A high speed infrared camera with four band-pass filters was used to acquire images of radiation intensity emitted by: carbon dioxide, water vapor, combined carbon dioxide and water vapor, and soot. A Large Eddy Simulation (LES) of the soot containing flame was carried out. Resolved scale temperature, CO2 and H2O mole fractions, and soot volume fraction distributions from the simulations were extracted and used in conjunction with the radiation transfer equation and a narrow band model to compute the quantitative spectral radiation intensity images. The computed images and statistics were compared with the measurements and showed encouraging agreement for the 4.3 μm CO2 band but required adjustments in the soot volume fractioins for the 2.58 μm H2O band and the continuum soot radiation. QIRI is demonstrated to be useful tool for identifying potential shortcomings in the soot model.

Original languageEnglish (US)
Title of host publication54th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103933
StatePublished - 2016
Event54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States
Duration: Jan 4 2016Jan 8 2016

Publication series

Name54th AIAA Aerospace Sciences Meeting


Other54th AIAA Aerospace Sciences Meeting, 2016
Country/TerritoryUnited States
CitySan Diego

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering


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