Modelling of spray and combustion processes by using the Eulerian multiphase approach and detailed chemical kinetics

Petranović, Zvonimir; Edelbauer, Wilfried; Vujanović, Milan; Duić, Neven

doi:10.1016/j.fuel.2016.11.051

Cited by 37 publications

(13 citation statements)

References 32 publications

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“…Discrete droplet method (DDM) [30] still remains industrial standard for numerical spray description [31] in spite the fact that Euler Eulerian size of class model has gained attention recently for specific tasks, such as computation of dense sprays [32]. The DDM is grouping droplets of the same size and physical properties into parcels and numerically solves only differential equations of parcels, thus enabling more efficient calculations.…”

Section: Lagrangian Spraymentioning

confidence: 99%

Numerical investigation of the transient spray cooling process for quenching applications

Baleta

Živić

et al. 2018

Therm sci

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Water spray quenching distinguished itself as a promising method for industry production, especially for the parts which require good mechanical strength while simultaneously retaining the initial toughness. Studies have shown that the heat transfer process during the spray quenching is mostly influenced by the spray impingement density, particle velocities and sizes. The application of advanced numerical methods still plays insufficient role in the development of the production process, in spite of the fact that industry today is facing major challenges that can be met only by development of new and more efficient systems using advanced tools for product development, one of which is CFD. Taking the above stated, the object of this research is numerical simulation of spray quenching process in order to determine validity of mathematical models implemented within the commercial CFD code Fire, especially droplet evaporation/condensation and droplet-wall heat transfer model. After review of the relevant literature suitable benchmark case was selected and simulated by employing discrete droplet method for the spray treatment and Eulerian approach for the gas phase description. Simulation results indicated that existing droplet/wall heat transfer model is not able to reproduce heat transfer of dense water spray. Thus, Lagrangian spray model was improved by implementing experimental correlation for heat transfer coefficient during spray quenching. Finally, verification of the implemented model was assessed based on the conducted simulations and recommendations for further improvements were given.

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Section: Lagrangian Spraymentioning

confidence: 99%

Numerical investigation of the transient spray cooling process for quenching applications

Baleta

Živić

et al. 2018

Therm sci

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“…The Eulerian-Eulerian spray model here adopted has been extensively validated against experimental data, as reported in [39], concerning atomization and evaporation process, and in [23] concerning reactive cases.…”

Section: Near Nozzle Eulerian Spray Modelingmentioning

confidence: 99%

“…Subsequently, the 3D-CFD simulation approach has been defined, relying on the modeling of the internal nozzle flow; once characterized, it has been interfaced to the spray simulation, initializing the primary break-up model on the basis of the transient flow conditions at each outlet section of the multi-hole VCO nozzle. Among the possibilities, the spray modeling has been based on a coupled Euler-Lagrangian approach, whose features have recently been reported in the literature [23]. The simulations have been carried out in FIRE™ environment [24] (by AVL List GmbH, Graz, Austria).…”

Section: Introductionmentioning

confidence: 99%

On the Link between Diesel Spray Asymmetry and Off-Axis Needle Displacement

et al. 2017

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Abstract:Cutting edge experiments and thorough investigations have pointed out that radial components affect the needle lift of diesel nozzles. So far, the effects of such needle "off-axis" have been investigated within the nozzle and immediately downstream from the hole outlet. Here, the focus has been extended to the spray ambient, far outside a multi-hole VCO (Valve Covered Orifice) nozzle. A reference off-axis configuration of the needle has been defined and used to investigate its effects on the spray, in terms of hole-to-hole differences. Indeed, the spray alterations due to the needle position have been addressed for those factors, such as the velocity-coefficient C V and the area-coefficient C A , able to describe the nozzle flow behavior under needle off-axis. The investigation has been based on 3D-CFD (three-dimensional computational fluid dynamics) campaigns. The modeling of diesel nozzle flow has been interfaced to the Eulerian-Eulerian near-nozzle spray simulation, initializing the break-up model on the basis of the transient flow conditions at each hole outlet section. The dense spray simulation has been on-line coupled to the Eulerian-Lagrangian modeling of the dilute spray region. Quantitative results on each fuel spray have been provided (in terms of penetration and Sauter Mean Diameter). The range of variability within the spray characteristics are expected to vary has been found and reported, providing reference information for lumped parameter models and other related investigations.

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“…All of the mentioned approaches are still being actively researched [18,19,[24][25][26][27][28][29][30][31], and the academic and engineering community is constantly re-evaluating which approach gives the best trade-off between the cost and accuracy for each problem. This work presents the development of a Eulerian multi-fluid framework for predicting dynamic spray behavior in OpenFOAM.…”

Section: Introductionmentioning

confidence: 99%

Development of a Eulerian Multi-Fluid Solver for Dense Spray Applications in OpenFOAM

et al. 2020

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The new generation of internal combustion engines is facing various research challenges which often include modern fuels and different operating modes. A robust modeling framework is essential for predicting the dynamic behavior of such complex phenomena. In this article, the implementation, verification, and validation of a Eulerian multi-fluid model for spray applications within the OpenFOAM toolbox are presented. Due to its open-source nature and broad-spectrum of available libraries and solvers, OpenFOAM is an ideal platform for academic research. The proposed work utilizes advanced interfacial momentum transfer models to capture the behavior of deforming droplets at a high phase fraction. Furthermore, the WAVE breakup model is employed for the transfer of mass from larger to smaller droplet classes. The work gives detailed instructions regarding the numerical implementation, with a dedicated section dealing with the implementation of the breakup model within the Eulerian multi-fluid formulation. During the verification analysis, the model proved to give stable and consistent results in terms of the selected number of droplet classes and the selected spatial and temporal resolution. In the validation section, the capability of the developed model to predict the dynamic behavior of non-evaporating sprays is presented. It was confirmed that the developed framework could be used as a stable foundation for future fuel spray modeling.

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Modelling of spray and combustion processes by using the Eulerian multiphase approach and detailed chemical kinetics

Cited by 37 publications

References 32 publications

Numerical investigation of the transient spray cooling process for quenching applications

Numerical investigation of the transient spray cooling process for quenching applications

On the Link between Diesel Spray Asymmetry and Off-Axis Needle Displacement

Development of a Eulerian Multi-Fluid Solver for Dense Spray Applications in OpenFOAM

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