Modeling Spray C and Spray D with FGM within the framework of RANS and LES

In this study, two different diesel-like igniting sprays are investigated: Engine Combustion Network (ECN) Spray C and D. particular, study focuses on the respective performances of RANS LES models to predict a turbulent, spray using OpenFOAM platform. The breakup model, discretization schemes, case setups, including combustion kept constant in order mitigate any potential effect simulation apart from intrinsic differences due turbulence modeling. A classic κ-ε model is applied for approach, while dynamic structure used solve momentum equation approach. constants tuned obtain suitable prediction inert experiments. Both approaches exhibit reasonable agreement with experiments regarding global characteristics, liquid length, vapor penetration. However, transient local properties, spatial distribution mixture fraction variance species distributions, not identical. For reacting conditions, Flamelet Generate Manifold (FGM) adopted both simulations, several enthalpy levels as fourth dimension tabulation account heat loss. results show good between models, terms penetration, lift-off short ignition delay registered frameworks. Turbulence–chemistry interaction (TCI) considered by applying presumed probability density function (β-PDF) fraction, found play key role reproduction domain.