Modelling of wall impinging behavior with a fan-shaped spray

摘要

The experiment-based droplet impinging breakup model was applied to a fan-shaped spray and the impinging behavior was analyzed quantitatively. Evaluation of the quantitative results with validation tests verified the following. · The model enables prediction of fan-shaped spray thickness after impingement caused by the breakup of fuel droplets, which could not be represented with the Wall-Jet model, widely used at present. · Fuel film movement on a wall is negligible when the injection pressure of the fan-shaped spray is high and the spray traveling length is not too short. · The proposed heat transfer coefficient between fuel film and the wall is too small to represent the vaporizing rate of the fuel film.