Effects of Ignition Position on Combustion in Rotary Engine Fueled with Natural Gas

To realize dynamic simulation of rotary engine working process,combustion and turbulent flow models were established for a spark-ignition rotary engine.Based on them the in-cylinder gas flow-field,temperature field and flame propagation process were simulated.Furthermore,effect of ignition position on the flame propagation was examined in the same ignition condition.The results show that when the ignition position is located between turbulent and unidirectional flow regions,peak pressure increases,meanwhile average temperature in cylinder and NO emission increase accordingly.