The laminar combustion processes of natural gas-air mixtures with various equivalence ratios under different initial pressures and initial temperatures were studied in a constant volume combustion bomb using schlieren photography. Both unstretched flame speed and unstretched laminar burning velocity were obtained by analyzing flame photos. The experimental results show that unstretched flame speed and unstretched flame burning velocity increase first and then decrease with the increase of equivalence ratio, reaching the maximum value around stoichiometric ratio. Both unstretched flame speed and unstretched laminar burning velocity decrease with the increase of initial pressure, while they increase with the increase of initial temperature.
|Number of pages||8|
|Journal||Ranshao Kexue Yu Jishu/Journal of Combustion Science and Technology|
|Publication status||Published - 1 Aug 2010|