Diesel Spray Simulation under Non-evaporating Condition with WAVE and Modified Improved TAB Model

抄録

In spray combustion simulation, many breakup models have been developed and introduced into CFD simulation to predict the breakup process of spray droplets, which is very important for the mixture formation process. Theoretical models such as Taylor Analogy Breakup (TAB) Model are widely used as a droplet breakup model. To make TAB Model an experimental model, Improved TAB (ITAB) Model has been developed based on the observation results of the single droplet breakup process. In this study, Modified Improved TAB (MITAB) Model was developed as the new droplet breakup model. The model modifies calculation methods of droplet diameter and droplet velocity after breakup in ITAB Model based on observation results of the single droplet breakup process. WAVE-MITAB Model which combined with WAVE Model and MITAB Model was introduced into KIVA as the new spray breakup model, and CFD analysis was performed. In addition, the applicability of WAVE-MITAB Model to non-evaporating diesel spray was investigated by varying the calculation constant of WAVE Model and comparing with other spray breakup models.