Abstract
In order to improve the accuracy of practical numerical analysis of high-pressure injection fuel sprays under high-pressure and high-temperature ambient gas conditions using relatively coarse computational grids, we introduced the following our original models into authors'GTT code for fuel injection engine combustion analysis: 1) Gas parcel method. 2) Two-stage modified wave break-up model, and its parameter functions. 3) Model of relative velocity between each droplet and the ambient gas. Using these models, the three-dimensional numerical analysis of the combustion in a direct-injection diesel engine could be performed under various conditions. The calculated results were compared with the experimental data. As a result, we could confirm that the original models are effective in improving the accuracy of engine combustion analysis.
