LAUSR

The feasibility of improving ignition and combustion performance of methane by ozone addition has been studied in the present work. First, combustion of a lean methane/air mixture with ozone addition was conducted by using a constant volume combustion bomb. Results showed that ozone could extend the lean combustion limit and accelerate flame speed. Then, chemical reaction kinetic analysis was adopted to obtain ignition delay time and laminar flame speed which were used to analyze the influence of ozone on ignition and the combustion performance of the lean methane/air mixture, respectively. Analysis carried out with different equivalence ratio, initial temperature, and pressure showed that ignition delay time was shortened obviously with ozone addition. The peak concentration of CH2O increased and the time of peak concentration appearance advanced with ozone addition, which indicated that the beginning time of the low temperature reaction was advanced with ozone addition and thus improved ignition perform...