Title of article :
HIGH-SPEED SCHLIEREN PHOTOGRAPHY OF CONFINED GASEOUS EXPLOSIONS
Author/Authors :
Saqr, K.M. Universiti Teknologi Malaysia - Faculty of Mechanical Engineering - High-Speed Reacting Flow Laboratory, MALAYSIA , Wahid, M.A. Universiti Teknologi Malaysia - Faculty of Mechanical Engineering - High-Speed Reacting Flow Laboratory, MALAYSIA , Sies, M.M. Universiti Teknologi Malaysia - Faculty of Mechanical Engineering - High-Speed Reacting Flow Laboratory, MALAYSIA , Ujir, M.H. Generation Unit, TNB Research, MALAYSIA
Abstract :
The tempo-spatial evolution of the combustion kernel in gas phase explosions was experimentally investigated using millisecond-resolution Schlieren photography. Methane and propane -air explosions were initiated in a cylindrical explosion vessel at a range of equivalence ratios ranging from 0.6 to 1.4. All explosions were initiated using a 25 mJ ignition energy source at ambient conditions. The explosion kernel growth rate and cellular flame structure are observed and analyzed. The growth of the primary flame kernel in propane-air explosions was found to be slower than that of the methane-air explosions, for lean mixtures. The opposite was found for stoichiometric and rich mixtures. The establishment of the cellular structure was found to occur after a certain period of time, which varies according to the fuel type and equivalence ratio
Keywords :
Combustion , Explosion , Gas
Journal title :
International Journal of Mechanical and Materials Engineering
Journal title :
International Journal of Mechanical and Materials Engineering
