Combustion Analysis By Entrainment Model in a Spark-Ignition Engine 852212

Combustion in a spark-ignition engine is affected by the complicated gas movement.

It is difficult to analyze such combustion process. However, the combustion modeling is very useful for the analysis of the combustion process.

For this purpose, we made use of the entrainment model and expressed the turbulent flame velocity as a function of laminar flame velocity, simplified combustion-chamber shape and inlet flow velocity.

As the results of this paper, we found that the predicted rate of mass burned by this method is similar to the value obtained by the analysis of the indicator diagram. The turbulent flame velocity was found to be affected greatly by the engine speed and the combustion chamber shape.

The flame factor which is the characteristic constant of the experimental engine, can be determined by the variables such as laminar flame velocity, engine speed and combustion chamber shape. The relation of flame factor with each of these variables is closely examined in this paper.