Abstract
In the modern era scientists and engineers were looking for the alternative ways in order to reduce the fuel consumption. Laser provides greater number of working hours up to 10,000 h and better combustion as compared to spark plug i.e. 4000 h. This research involves the analysis of laser ignition in a constant volume combustion chamber and its comparison with spark plug. For this purpose Litron NanoL200-30 (UK) laser was used. The analysis revealed, by increasing the mass fraction of fuel in air-fuel mixture temperature in the chamber was increased. Conversely, increase in pressure in combustion chamber decreased the combustion temperature of methane. The auto-ignition temperature of methane was supposed to be 580 ̊C (1076 K) and it was reduced to 751K by ignition through laser source at 10 bars. Pulse duration plays an important role during combustion in laser ignition. The temperature of chamber was found to be diminished by decrease in pulse duration. Similar trend was found in the case of heat flux respectively. The results showed the large flame front and greater turbulence in the case of laser because of increased heat flux which makes this process more effective, reliable and has proper combustion as compared to spark plug.