Support for Advanced Imaging of Premixed Turbulent Combustion Processes
Final rept. 7 Aug 2003-6 Aug 2004
CORNELL UNIV ITHACA NY
Pagination or Media Count:
The laser imaging diagnostics of crossed-plane laser tomography CPLT and stereo particle image velocimetry SPIV have been combined for a systematic study of premixed turbulent combustion in CH4-air, V-burner and swirl-burner flames. Data sets comprised of between 1500 and 2000 realizations have been obtained for 11 different V-flame conditions and 5 different swirl-burner flame conditions. These raw data sets are being analyzed to build a unique database that quantifies mean flame properties e.g., mean progress variable fields, chemical reaction sheet wrinkling by turbulence e. g., reaction sheet orientation statistics, curvatures and surface density data and important velocities e. g., velocity field of reactants, reaction sheet displacement speeds and gas velocity correlations at the reaction sheet surface. The most significant finding to date is that of negative displacement speeds and a correlation between displacement speed and reaction sheet curvature. These developments are outlined in this report.
- Combustion and Ignition