Large-eddy simulations for internal combustion engines – a review
Reads0
Chats0
TLDR
A review of using large-eddy simulation (LES) in computational fluid dynamic stud- ies of internal combustion engines is presented in this paper, where the major modelling approaches for turbulence, combustion, scalars, and liquid sprays are discussed.Abstract:
A review of using large-eddy simulation (LES) in computational fluid dynamic stud- ies of internal combustion engines is presented. Background material on turbulence model- ling, LES approaches, specifically for engines, and the expectations of LES results are discussed. The major modelling approaches for turbulence, combustion, scalars, and liquid sprays are discussed. In each of these areas, a taxonomy is presented for the various types of models appropriate for engines. Advantages, disadvantages, and examples of use in the litera- ture are described for the various types of models. Several recent examples of engine studies using LES are discussed. Recommendations and future prospects are included.read more
Citations
More filters
New insights into large eddy simulation
TL;DR: In this paper, the authors proposed a monotone integrated large eddy simulation approach, which incorporates a form of turbulence modeling applicable when the large-scale flows of interest are intrinsically time dependent, thus throwing common statistical models into question.
Journal ArticleDOI
Spray measurement technology: a review
Todd D. Fansler,Scott E. Parrish +1 more
TL;DR: In this article, the authors present a survey of spray measurement techniques and issues in spray physics and spray engineering, including the need for simultaneous diagnostic measurements under application-relevant conditions, and the effective comparison of spray measurements and numerical simulations.
Journal Article
Large eddy simulation of a nonpremixed reacting jet: Application and assessment of subgrid-scale combustion models
TL;DR: In this paper, the results from large eddy simulations (LES) and direct numerical simulations (DNS) of a two-dimensional, spatially developing, compressible planar free jet undergoing an idealized, exothermic, chemical reaction of the type F+rOx→(1+r)P are presented in order to assess several subgrid-scale combustion models.
Journal ArticleDOI
Large eddy simulation of a reacting spray flame with multiple realizations under compression ignition engine conditions
Yuanjiang Pei,Sibendu Som,Eric Pomraning,Peter Kelly Senecal,Scott A. Skeen,Julien Manin,Lyle M. Pickett +6 more
TL;DR: In this article, an n-dodecane spray flame (Spray A from Engine Combustion Network) was simulated using a δ function combustion model along with a dynamic structure large eddy simulation (LES) model to evaluate its performance at engine-relevant conditions and to understand the transient behavior of this turbulent flame.
Journal ArticleDOI
Stratified turbulent flames: Recent advances in understanding the influence of mixture inhomogeneities on premixed combustion and modeling challenges
TL;DR: In this paper, the authors introduce experimental facilities and numerical tools applied to investigating inhomogeneously premixed flames, and summarize recent progress in revealing and understanding local phenomena (e.g., back-supported combustion or generation of flame surface area) that stem from the influence of mixture inhomogenities on flame propagation through flammable reactants.
References
More filters
Journal ArticleDOI
Conditional moment closure for turbulent reacting flow
TL;DR: In this article, the authors derived and modeled the variation through the flow field of averages of quantities such as species mass fractions, conditional on mixture fraction, and made predictions for the reacting scalar mixing layer, and these show good agreement with experiment.
Journal ArticleDOI
Experiments and Modeling of Dual-Fuel HCCI and PCCI Combustion Using In-Cylinder Fuel Blending
Journal ArticleDOI
The basic equations for the large eddy simulation of turbulent flows in complex geometry
Sandip Ghosal,Parviz Moin +1 more
TL;DR: In this paper, an alternate definition of the filtering operation based on the mapping function of the nonuniform grid is introduced, and it is shown that with this modified definition the filtering and differentiation operations commute up to an error which is second order in the filter width.
Journal ArticleDOI
Large-eddy simulation of a turbulent piloted methane/air diffusion flame (Sandia flame D)
Heinz Pitsch,Helfried Steiner +1 more
TL;DR: In this article, the Lagrangian flamelet model is applied in a large-eddy simulation of a piloted partially premixed methane/air diffusion flame (Sandia flame D) and the results of the simulation are compared to experimental data of the mean and RMS of the axial velocity and the mixture fraction and the unconditional and conditional averages of temperature and various species mass fractions, including CO and NO.
Journal ArticleDOI
Approximate Wall Boundary Conditions in the Large-Eddy Simulation of High Reynolds Number Flow
William Cabot,Parviz Moin +1 more
TL;DR: In this article, the authors examine results from simulations of both attached and separated flows on coarse grids in which the near-wall regions are not resolved and are instead represented by approximate wall boundary conditions.