Fuel injection model for Euler–Euler and Euler–Lagrange large-eddy simulations of an evaporating spray inside an aeronautical combustor

Sanjosé, Marlène; Senoner, Jean-Mathieu; Jaegle, F.; Cuenot, Bénédicte; Moreau, Stéphane; Poinsot, Thiérry

doi:10.1016/j.ijmultiphaseflow.2011.01.008

Cited by 107 publications

(61 citation statements)

References 44 publications

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“…A model is therefore needed for the description of the resulting dispersed liquid phase that is injected in the simulations, (2) The evolution of the droplet mist has to be described at a computational cost consistent with the available resources. Two main approaches exist for the large eddy simulation of two-phase reacting flows, both relying on mesoscopic models [12]: the Eulerian-Eulerian approach, where moments of the number density function (NDF) are transported [13,14] and the Eulerian-Lagrangian model where a set of individual particles are being tracked [15][16][17]. In the Eulerian-Lagrangian framework, it is relatively easy to account for polydispersion, while the Eulerian-Eulerian approach requires an additional set of transport equations for each moment and/or class of particle sizes, notably increasing the computational cost.…”

Section: Introductionmentioning

confidence: 99%

Large-Eddy Simulation of Light-Round in an Annular Combustor With Liquid Spray Injection and Comparison With Experiments

Lancien

Prieur

Durox

et al. 2017

Volume 4A: Combustion, Fuels and Emissions

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The light-round is defined as the process by which the flame initiated by an ignition spark propagates from burner to burner in an annular combustor, eventually leading to a stable combustion. Combining experiments and numerical simulation, it was recently demonstrated that under perfectly premixed conditions this process could be suitably described by large eddy simulation (LES) using massively parallel computations. The present investigation aims at developing light-round simulations in a configuration that is closer to that found in aero-engines by considering liquid nheptane injection. The large-eddy simulation of the ignition sequence of a laboratory scale annular combustion chamber comprising sixteen swirled spray injectors is carried out with a mono-disperse Eulerian approach for the description of the liquid phase. The objective is to assess this modeling approach of the two-phase reactive flow during the ignition process. The simulation results are compared in terms of flame structure and light-round duration to the corresponding experimental images of the flame front recorded by a high-speed intensified CCD camera and to the corresponding experimental delays. The dynamics of the flow is also analyzed to identify and characterize mechanisms controlling flame propagation during the light-round process.

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Section: Introductionmentioning

confidence: 99%

Large-Eddy Simulation of Light-Round in an Annular Combustor With Liquid Spray Injection and Comparison With Experiments

Lancien

Prieur

Durox

et al. 2017

Volume 4A: Combustion, Fuels and Emissions

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“…In the present work a coupled Eulerian (for the gas-phase flow) and Lagrangian (for the liquid-phase flow) formulation is used to represent the spray dynamics and the interaction between the gas and liquid phases flow [4,5,6,7,8,9]. The Eulerian-Lagrangian framework represents a natural approach for flows where a dispersed phase is present.…”

Section: Introductionmentioning

confidence: 99%

Large-eddy simulation of spray combustion in a gas turbine combustor

Jones

Marquis

Vogiatzaki

2014

Combustion and Flame

116

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link AbstractThe paper describes the results of a comprehensive study of turbulent mixing, fuel spray dispersion and evaporation and combustion in a gas-turbine combustor geometry (the DLR Generic Single Sector Combustor) with the aid of Large Eddy Simulations (LES). An Eulerian description of the continuous phase is adopted and is coupled with a Lagrangian formulation of the dispersed phase. The sub-grid scale (sgs) probability density function approach in conjunction with the stochastic fields solution method is used to account for sgs turbulencechemistry interactions. Stochastic models are used to represent the influence of sgs fluctuations on droplet dispersion and evaporation. Two different test cases are simulated involving reacting and non-reacting conditions. The simulations of the underlying flow field are satisfying in terms of mean statistics and the structure of the flame is captured accurately. Detailed spray simulations are also presented and compared with measurements where the fuel spray model is shown to reproduce the measured SMD and velocity of the droplets accurately.

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“…Therefore, particles are directly injected at the atomizer orifice using semi-empirical relations to specify their velocities while relying on experimental data to determine their size distribution [36]. The velocity profile used for particle injection is then made of two components, a constant axial velocity deduced from liquid mass conservation at the atomizer nozzle and an azimuthal velocity component resulting from the swirling motion imposed to the liquid within the atomizer.…”

Section: Injection Proceduresmentioning

confidence: 99%

“…Both are deduced using empirical correlations of the literature [20] based on the orifice radius R 0 = 0.5 mm, the liquid mass flow rateṁ l = 2.25 g s −1 and the spray half angle θ 0 s = 40 • . The reader is referred to Sanjose et al [36] for more details on the injection procedure. The experimental particle size distribution is approximated via a log-normal law:…”

Section: Injection Proceduresmentioning

confidence: 99%

Large-Eddy Simulation of Kerosene Spray Ignition in a Simplified Aeronautic Combustor

Hervo

Senoner

Biancherin

et al. 2018

Flow Turbulence Combust

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Fuel injection model for Euler–Euler and Euler–Lagrange large-eddy simulations of an evaporating spray inside an aeronautical combustor

Cited by 107 publications

References 44 publications

Large-Eddy Simulation of Light-Round in an Annular Combustor With Liquid Spray Injection and Comparison With Experiments

Large-Eddy Simulation of Light-Round in an Annular Combustor With Liquid Spray Injection and Comparison With Experiments

Large-eddy simulation of spray combustion in a gas turbine combustor

Large-Eddy Simulation of Kerosene Spray Ignition in a Simplified Aeronautic Combustor

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