The effect of spark plug location on cylinder pressure, temperature field and pollutants concentration

الملخص EN

The growing concern about the fast depletion of hydrocarbon-based fuels and the environmental pollution caused by their combustion has been a compelling incentive to all researchers to study the effective parameters on the combustion processes.

One of these parameters is the effect of spark plug location.

Keeping this in mind, a mathematical model for the power cycle in a 4-stroke spark ignition engine was developed using quasi-dimensional cycle simulation.

The model takes in to consideration mass and energy conservation in the engine cylinder.

The model calculates instantaneous variation in gas thermodynamic states, gas properties, cylinder pressure, burnt temperature, turbulent flame speed, flame radius, and pollutants formation.

Three spark plug location are used, namely, 1- The spark plug at the center.

2- The spark plug is at a distant ratio (0.4).

3- The spark plug is at a distant ratio (0.3).

It is found that the position of the spark plug have a strong effect on the pressure, temperature, flame speed, and pollutants concentration.

Shifting the spark plug from central position towards the wall reduces all studied parameters.