A reduced-order model for multiphase simulation of transient inert sprays in the context of compression ignition engines

In global efforts to reduce harmful greenhouse gas emissions from the transportation sector, novel bio-hybrid liquid fuels renewable energy and carbon sources can be a major form of for future propulsion systems due their high density. A fundamental understanding spray mixing performance new fuel candidates in combustion is necessary design develop advanced concepts. process, large number required screened arrive at potential further detailed investigations. For such screening three-dimensional (3D) simulation models are computationally too expensive hence unfeasible. Therefore, this paper, we present fast, reduced-order model inert sprays. The based on cross-sectionally averaged (CAS) derived by Wan (1997) 3D multiphase equations. original was first tested against wide range conditions different fuels. discrepancies between CAS experimental data addressed integrating state-of-the-art breakup evaporation models. addition, transport equation vapor mass fraction proposed, which important modeling. Furthermore, extended consider polydisperse droplets modeling droplet size distribution commonly used presumed probability density functions, as Rosin–Rammler, lognormal, gamma distributions. improved capable predicting trends macroscopic characteristics computational cost lower than methods up 6 orders magnitude depending method. This enables not only rapid candidates, but also other applications, where useful.