Detached Eddy Simulation of Turbulent Spray Combustion in a Turbo Jet Combustor - Prediction of NOx Concentration

Large-eddy simulation (LES) is applied to turbulent spray combustion fields in a subscale (1/2) aircraft jet engine combustor with an air-blast type swirl fuel nozzle and validity is examined by comparing with measurements. In the LES, Jet-A is used as liquid fuel, and individual droplet motion is tracked in a Lagrangian manner with a parcel model. As a turbulent combustion model, the extended flamelet/progress-variable approach, in which heat transfer between droplets and ambient gas including radiation and heat loss from walls can be taken into account, is employed. A detailed chemistry mechanism of Jet-A with 1537 reactions and 274 chemical species is used. The radiative heat transfer is computed by the discrete ordinate (DO) method. The equivalence ratio ranges from 0.91 to 1.29. The comparisons of the predicted droplet velocity and size, gaseous temperature, NO, and soot emissions with the measurements show that the present LES is capable of capturing the general features of the turbulent spray combustion fields in the subscale (1/2) aircraft jet engine combustor.

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Large Eddy Simulation of Diluted Turbulent Spray Combustion Based on FGM Methodology: Effect of fuel and Mass Loading

Experiments and Numerical Simulations of Turbulent Combustion of Diluted Sprays - ERCOFTAC Series ◽

10.1007/978-3-319-04678-5_5 ◽

2014 ◽

pp. 107-128 ◽

Cited By ~ 2

Author(s):

Amsini Sadiki ◽

Mouldi Chrigui ◽

Fernando Sacomano ◽

Assaad R. Masri

Keyword(s):

Large Eddy Simulation ◽

Spray Combustion ◽

Mass Loading ◽

Eddy Simulation ◽

Turbulent Spray Combustion ◽

Large Eddy ◽

Turbulent Spray

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Large eddy simulation of turbulent spray combustion

Combustion and Flame ◽

10.1016/j.combustflame.2014.07.029 ◽

2015 ◽

Vol 162 (2) ◽

pp. 431-450 ◽

Cited By ~ 62

Author(s):

Abolfazl Irannejad ◽

Araz Banaeizadeh ◽

Farhad Jaberi

Keyword(s):

Large Eddy Simulation ◽

Spray Combustion ◽

Eddy Simulation ◽

Turbulent Spray Combustion ◽

Large Eddy ◽

Turbulent Spray

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J011023 Large-Eddy Simulation of Turbulent Spray Combustion at High Pressure

The Proceedings of Mechanical Engineering Congress Japan ◽

10.1299/jsmemecj.2013._j011023-1 ◽

2013 ◽

Vol 2013 (0) ◽

pp. _J011023-1-_J011023-4

Author(s):

Tomoaki KITANO ◽

Takafumi TSUJI ◽

Ryoichi KUROSE ◽

Satoru KOMORI

Keyword(s):

High Pressure ◽

Large Eddy Simulation ◽

Spray Combustion ◽

Eddy Simulation ◽

Turbulent Spray Combustion ◽

Large Eddy ◽

Turbulent Spray

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Investigations of Evaporative Cooling and Turbulence Flame Interaction Modeling in Ethanol Turbulent Spray Combustion Using Tabulated Chemistry

Fluids ◽

10.3390/fluids4040187 ◽

2019 ◽

Vol 4 (4) ◽

pp. 187 ◽

Cited By ~ 4

Author(s):

Fernando Luiz Sacomano Filho ◽

Louis Dressler ◽

Arash Hosseinzadeh ◽

Amsini Sadiki ◽

Guenther Carlos Krieger Filho

Keyword(s):

Evaporative Cooling ◽

Spray Combustion ◽

Flame Surface ◽

Flamelet Generated Manifold ◽

Tabulated Chemistry ◽

Turbulent Spray Combustion ◽

Interaction Modeling ◽

Cooling Effects ◽

Turbulent Spray ◽

Modeling Strategy

Evaporative cooling effects and turbulence flame interaction are analyzed in the large eddy simulation (LES) context for an ethanol turbulent spray flame. Investigations are conducted with the artificially thickened flame (ATF) approach coupled with an extension of the mixture adaptive thickening procedure to account for variations of enthalpy. Droplets are tracked in a Euler–Lagrangian framework, in which an evaporation model accounting for the inter-phase non-equilibrium is applied. The chemistry is tabulated following the flamelet generated manifold (FGM) method. Enthalpy variations are incorporated in the resulting FGM database in a universal fashion, which is not limited to the heat losses caused by evaporative cooling effects. The relevance of the evaporative cooling is evaluated with a typically applied setting for a flame surface wrinkling model. Using one of the resulting cases from the evaporative cooling analysis as a reference, the importance of the flame wrinkling modeling is studied. Besides its novelty, the completeness of the proposed modeling strategy allows a significant contribution to the understanding of the most relevant phenomena for the turbulent spray combustion modeling.

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