Application of a flamelet-based CFD combustion model to the LES simulation of a diesel-like reacting spray

Desantes, J.M.; García-Oliver, José M; Novella, Ricardo; Pérez-Sánchez, Eduardo J.

doi:10.1016/j.compfluid.2019.104419

Cited by 26 publications

(22 citation statements)

References 71 publications

(77 reference statements)

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“…Z st from Table 1 refers to the stoichiometric mixture fraction, while Z s is the saturation mixture fraction, that is the maximum mixture fraction for which fuel does not condensate and is calculated from a mixing-controlled approach. 34 The study by Desantes et al 35 was focused on the ambient temperature sweep gathered in Table 1. Therefore, only some general results corresponding to these parametric variations are shown here in order to show the capabilities of the model, and the main analysis is focused on the oxygen sweep.…”

Section: Problem Description and Modelling Approachmentioning

confidence: 99%

“…Regarding the turbulent spray, first the model is validated under inert conditions in order to obtain a proper configuration of the turbulent and droplet model constants. As such configuration is the same as the one described in the study by Desantes et al, 35 here only a shortened validation of the model is given. Figure 5 shows the experimental and modelled vapour and liquid penetrations for the inert nominal case.…”

Section: Validation Of the Turbulent Spray Modelmentioning

confidence: 99%

“…Results for inert nominal condition. 35 case for different C x values. Profiles have been averaged over time.…”

Section: Validation Of the Turbulent Spray Modelmentioning

confidence: 99%

“…Although the focus of the article is on the effect of ambient oxygen concentration, the temperature parametric variation is also included to show the predictive capability of the model. More details on this study can be found in the study by Desantes et al 35 For modelling purposes and according to the ECN criterion, 2 ID is defined as the time spent from the start of injection until the maximum derivative of the maximum instantaneous Favre-filtered temperature field is reached. The ID curves for both parametric sweeps are gathered in Figure 9.…”

Section: Description Of the Flame Metricsmentioning

confidence: 99%

“…Vapour penetration and liquid length for experimental and simulated inert nominal conditions. For experiments, uncertainty of measurements is delimited with shadows 35. …”

mentioning

confidence: 99%

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Understanding the diesel-like spray characteristics applying a flamelet-based combustion model and detailed large eddy simulations

Pérez-Sánchez

García-Oliver

Novella

et al. 2019

International Journal of Engine Research

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This investigation analyses the structure of spray A from engine combustion network (ECN), which is representative of diesel-like sprays, by means of large eddy simulations and an unsteady flamelet progress variable combustion model. A very good agreement between modelled and experimental measurements is obtained for the inert spray that supports further analysis. A parametric variation in oxygen concentration is carried out in order to describe the structure of the flame and how it is modified when mixture reactivity is changed. The most relevant trends for the flame metrics, ignition delay and lift-off length are well-captured by the simulations corroborating the suitability of the model for this type of configuration. Results show that the morphology of the flame is strongly affected by the boundary conditions in terms of the reactive scalar spatial fields and Z–T maps. The filtered instantaneous fields provided by the simulations allow investigation of the structure of the flame at the lift-off length, whose positioning shows low fluctuations, and how it is affected by turbulence. It is evidenced that small ignition kernels appear upstream and detached from the flame that eventually merge with its base in agreement with experimental observations, leading to state that auto-ignition plays a key role as one of the flame stabilization mechanisms of the flame.

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Section: Problem Description and Modelling Approachmentioning

confidence: 99%

Section: Validation Of the Turbulent Spray Modelmentioning

confidence: 99%

“…Results for inert nominal condition. 35 case for different C x values. Profiles have been averaged over time.…”

Section: Validation Of the Turbulent Spray Modelmentioning

confidence: 99%

Section: Description Of the Flame Metricsmentioning

confidence: 99%

“…Vapour penetration and liquid length for experimental and simulated inert nominal conditions. For experiments, uncertainty of measurements is delimited with shadows 35. …”

mentioning

confidence: 99%

See 3 more Smart Citations

Understanding the diesel-like spray characteristics applying a flamelet-based combustion model and detailed large eddy simulations

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Novella

et al. 2019

International Journal of Engine Research

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Studies on theory and modeling of droplet and spray combustion in China: a review

Zhou

2021

Acta Mech. Sin.

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Large eddy simulation of soot formation and oxidation for different ambient temperatures and oxygen levels

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Ong

Pang³

et al. 2022

Applied Energy

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Application of a flamelet-based CFD combustion model to the LES simulation of a diesel-like reacting spray

Cited by 26 publications

References 71 publications

Understanding the diesel-like spray characteristics applying a flamelet-based combustion model and detailed large eddy simulations

Understanding the diesel-like spray characteristics applying a flamelet-based combustion model and detailed large eddy simulations

Studies on theory and modeling of droplet and spray combustion in China: a review

Large eddy simulation of soot formation and oxidation for different ambient temperatures and oxygen levels

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