Simulation and Experimental Validation of Spark Plug Temperature Coupled with Combustion in Four-Stroke Gasoline Engine

摘要

A heat conduction simulation of a spark plug weakly coupled with combustion was developed. As one of the dominant parameters of the spark plug, the heat flux between combustion gas and a spark plug was then evaluated. Computational cost was drastically reduced through modeling turbulent heat transfer rate and gas temperature in the vicinity of a spark plug as functions of surface temperature of a spark plug and crank angle. The simulation was validated with experimental data. Parameters tuning in turbulent heat flux model is requisite, and then it minimizes the discrepancy in the spark plug temperature between the simulation and the experiment within ±10%.