Behavior of Fuel Spray injected by Tailpipe Injector for Post Treatment of Diesel Engine Emissions (Second Report)

- Numerical Analysis of Swirl Spray Breakup -

Abstract

In order to predict spray feature of low-pressure swirl injector for diesel engine post treatment system, we inspected the most suitable breakup model. This report focuses on free spray to understand its physical breakup mechanism using scattered light method, Super High Spatial Resolution Photography (SHSRP) and single component fuel n-dodecane. As a result, it was clarified that the new hybrid breakup model which combines LISA (Linearized Instability Sheet Atomization) and MTAB (Modified Taylor Analogy Breakup) was effective to predict spray penetration and droplet diameter with high accuracy.