Evaluation of Turbulence-Chemistry Interaction Under Diesel Engine Conditions With Multi-Flamelet Rif Model

Kundu, Prithwish; Pei, Yuanjiang; Wang, Mingjie; Mandhapati, Raju; Som, Sibendu

doi:10.1615/atomizspr.2014010506

Cited by 52 publications

(42 citation statements)

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“…The simulation approach is well established in our previous publication [9], hence only a brief description is provided here. The liquid spray was treated in a traditional Lagrangian fashion.…”

Section: Modeling Methodsmentioning

confidence: 99%

“…The re-normalization group (RNG) k-turbulence model [35] was used. Adaptive mesh refinement (AMR) was also used based on velocity and temperature fields and the minimum cell size was fixed to 0.25 mm in all calculations, which has been demonstrated to be small enough to obtain grid-convergent results [9,36].…”

Section: Modeling Methodsmentioning

confidence: 99%

“…Towards this goal, the Engine Combustion Network (ECN) provides an international platform involving many research institutions and industries worldwide to make available high-quality experimental data under well-defined boundary conditions applicable to engine combustion [1]. An n-dodecane spray flame called Spray A has been the focus of both experimentalists [2][3][4][5] and modelers [6][7][8][9][10][11][12][13][14] in ECN. Although n-dodecane is not an ideal surrogate for transportation fuels, its choice is driven by the fact that the surrogate lends itself to different optical measurements and the physical and chemical properties of the fuel are precisely defined, unlike pump fuels.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Engine Combustion Network (ECN): Global sensitivity analysis of Spray A for different combustion vessels

Pei

Davis

Pickett

et al. 2015

Combustion and Flame

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a b s t r a c tGlobal sensitivity analysis was conducted on Spray A of the Engine Combustion Network's (ECN) experimental conditions across different combustion vessels from different institutions. The main objective was to understand the influence of differences in boundary conditions on specific targets of interest. A list of experimental initial, boundary, and injection conditions with uncertainty ranges were identified for three different ambient conditions for these combustion vessels. Five targets including the liquid length, vapor penetration length, ignition delay, lift-off length, and soot mass in the domain were extracted from hundreds of 3D computational fluid dynamics (CFD) simulations by simultaneously perturbing all the uncertain variables. Each target was analyzed using a global sensitivity analysis (GSA) method and the relative importance of different variables towards specific targets was identified. The uncertainty in the fuel temperature was found to have a profound influence on the liquid length, however, the influence on vapor penetration length, ignition delay, and lift-off length, was rather subtle. Small uncertainties in the initial turbulence level and nozzle diameter was observed to have a significant influence on the vapor penetration. Variables sensitive to ignition delay also showed similar sensitivity to flame lift-off length. The soot mass in the domain was observed to have a closer correlation with the liquid length at least for higher ambient temperature conditions.

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Section: Modeling Methodsmentioning

confidence: 99%

Section: Modeling Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Engine Combustion Network (ECN): Global sensitivity analysis of Spray A for different combustion vessels

Pei

Davis

Pickett

et al. 2015

Combustion and Flame

Self Cite

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“…The details of the computational models can be found in our previous study [33] and will only be briefly discussed here. The liquid phase was treated with a traditional Lagrangian discrete phase model along with the "blob" injection method [34].…”

Section: Computational Fluid Dynamic Modeling Approachmentioning

confidence: 99%

“…The reduced mechanism was extensively compared to the detailed mechanism by Pei et al [13]. Following the recommendations from Kundu et al [33] and Pei et al [13], more than 20 flamelets were used in the simulations, keeping in mind both computational accuracy and wall-clock times since higher number of flamelets typically increase the computational cost. The liquid mixture properties for n-dodecane and m-xylene were obtained from National Institute of Standards and Technology (NIST) [43].…”

Section: Computational Fluid Dynamic Modeling Approachmentioning

confidence: 99%

Experimental and numerical study of lift-off length and ignition delay of a two-component diesel surrogate

Payri

Viera

Pei

et al. 2015

Fuel

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Elsevier Payri, R.; Viera Sotillo, JP.; Pei, Y.; Som, S. (2015). Experimental and numerical study of liftoff length and ignition delay of a two-component diesel surrogate. AbstractUnderstanding and controlling mixing and combustion processes is fundamental for the ever more demanding pollutant regulations and fuel consumption standards of direct injection diesel engines. The fundamentals of these processes haven been long studied from both experimental and numerical perspectives. As numerical models become more advanced, the need for adequate experimental data increases. Hence, experimental methodologies and scientific databases need to be enhanced with more quantitative, accurate, consistent, and reliable information in order to evaluate the models in a robust fashion. The present study seeks to enhance the current state-of-the-art by further evaluating the combustion performance of a two-

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Recent Progress in Turbulent Combustion Modeling of Spray Flames Using Flamelet Models

Kundu

Ameen

Som

2017

Energy, Environment, and Sustainability

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Evaluation of Turbulence-Chemistry Interaction Under Diesel Engine Conditions With Multi-Flamelet Rif Model

Cited by 52 publications

References 0 publications

Engine Combustion Network (ECN): Global sensitivity analysis of Spray A for different combustion vessels

Engine Combustion Network (ECN): Global sensitivity analysis of Spray A for different combustion vessels

Experimental and numerical study of lift-off length and ignition delay of a two-component diesel surrogate

Recent Progress in Turbulent Combustion Modeling of Spray Flames Using Flamelet Models

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