Abstract
Although many CFD analyses have been applied for the prediction of spray behavior in the direct-injection gasoline engines, a priori estimation of the spray characteristics including the penetration length and the Sauter mean diameter is difficult, and the empirical determination of the model parameters are usually necessary. The purpose of this study is to develop a CFD modeling scheme to estimate the engine performance fromthe nozzle characteristics for the front-end loading design of injector nozzles.We have developed a method to predict the spray shapes by applying the LES turbulence model for the internal flow of the nozzles. The method has been applied to estimate the engine performance in conjunction with spray models.
