Numerical analysis of gasoline fuel with laser ignited spark ignition

Abstract

Laser ignition overcomes the problem of faster degradation of electrodes using high energy required for lean burn and reduced heat loss to the electrodes. A number of investigations have been carried out on laser ignition of gaseous fuels but the work, on laser ignition of liquid fuels is indeed very limited. In present work, a Multi-dimensional CFD model using ANSYS Fluent 17.2 was developed for constant volume combustion chamber (CVCC) to characterize laser ignition combustion phenomenon from the start of plasma formation to end of combustion. The combustion and emission characteristics of gasoline-air mixture ignited by laser-induced spark were studied using numerical simulation. It was predicted from results obtained from numerical results that peak pressure goes on increasing with the increase in equivalence ratios from 0.8 to 1.4. The numerical simulation results obtained were in good agreement with experimental results of literature with 10.6 % percentage error, which demonstrates that the model developed is valid for the combustion process. The trends of the NOX, CO, CO2, emissions were analyzed using a numerical model.