Development of a multiphase photon Monte Carlo method for spray combustion and its application in high-pressure conditions

Roy, S.C.; Cai, Jian; Modest, Michael F.

doi:10.1016/j.ijheatmasstransfer.2017.07.046

Cited by 12 publications

(5 citation statements)

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“…Over the past three decades, tremendous advances have been made in developing and applying the MC method to radiation transport in combustion environments [158,160,163,[177][178][179][180][181][182][183][184][185][186][187][188].…”

Section: Monte Carlo (Mc) Methodsmentioning

confidence: 99%

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Modeling Thermal Radiation in Combustion Environments: Progress and Challenges

Mazumder

Roy

2023

Energies

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Modeling thermal radiation in combustion environments can be extremely challenging for two main reasons. First, the radiative transfer equation (RTE), which is the cornerstone of modeling radiation in such environments, is a five-dimensional integro-differential equation. Second, the absorption and scattering coefficients of molecular gases and particulates prevalent in combustion environments oscillate strongly with the wavenumber (or wavelength), i.e., the medium is strongly nongray, requiring the solution of the RTE for a large number of wavenumbers. This article reviews the progress that has been made in this area to date with an emphasis on the work performed over the past three decades. Progress in both deterministic and stochastic (Monte Carlo) solutions of the RTE is reviewed, in addition to the review of the treatment of the spectral properties of gases, soot, and fuel droplets that dominate combustion environments, i.e., spectral or nongray models. The application of the various state-of-the-art nongray models and RTE solution methods to flames (particularly turbulent), fires, combustors, and other combustion systems are summarized along with a critical discussion of the pros and cons of the models and methods. Finally, the challenges that remain in modeling thermal radiation in combustion systems are highlighted and future outlooks are shared.

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Section: Monte Carlo (Mc) Methodsmentioning

confidence: 99%

“…Random number databases that allow the efficient sampling of the photon bundles were also developed and disseminated [189,190]. The MC method has also been extended to include multiphase media, such as combustion environments with solid particles or liquid droplets [182,183,191].…”

Section: Monte Carlo (Mc) Methodsmentioning

confidence: 99%

Modeling Thermal Radiation in Combustion Environments: Progress and Challenges

Mazumder

Roy

2023

Energies

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“…Several works focused on the numerical modeling of the ECN Spray A. This refers to a transient high-pressure turbulent n-dodecane spray flame operating under conditions that are relevant for compression-ignition piston engines (60 bars) [228]- [231]. Bolla et al [228] performed RANS simulations and compared two combustion models, namely a transported PDF model and a simpler well-mixed (WM) model that neglects turbulence-chemistry interaction and TRI.…”

Section: High Pressure Internal Combustion Enginesmentioning

confidence: 99%

“…The contribution of CO2, H2O, CO and soot were taken into account. Mukut and Roy [230] extended this radiation model by including the radiative contribution of the spray phase using the formulation developed by Roy et al [231]. They showed that the effect of spray and gas phase radiation on soot is minimal in the ECN Spray A combustion chamber and gas-phase radiation has a greater influence on NO formation than the spray-phase radiation.…”

Section: High Pressure Internal Combustion Enginesmentioning

confidence: 99%

The impact of radiative heat transfer in combustion processes and its modeling – with a focus on turbulent flames

Liu

Consalvi

Coelho

et al. 2020

Fuel

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Radiative heat transfer (RHT) is often the dominant mode of heat transfer in flames, fires, and combustion systems and affects significantly temperature distributions directly and kinetically controlled chemical processes indirectly. Modeling RHT accurately in multidimensional flames and combustion systems is challenging mainly due to the highly spectral dependence of radiative properties of combustion products, the high computational cost of solving the radiative transfer equation (RTE), and the strong turbulence and radiation interactions (TRI). Significant progress has been made in all the three aspects in the last three decades and the state-of-the-art models and methods have been incorporated into CFD practice for modeling fires, turbulent jet flames, and turbulent combustion in combustion systems. In this article, we first discuss the coupling between RHT and combustion and the important role played by RHT in some fundamental flame phenomena. Then we discuss the state-of-the-art radiation models with a focus on RTE solvers, radiative property models and TRI. Next, we review the recent simulations of turbulent combustion systems involving these state-of-the-art radiation models. Finally, we provide concluding remarks and some potential research areas to advance RHT modeling in multiphase reacting flows. Nomenclature, , area normal to directions x, y and z [m 2 ] non-grey stretching factor for WSGG, SLW, and FSK methods absorption cross-section of a soot primary particle [m 2 ] absorption cross-section of a soot aggregate [m 2 ] diameter [m] , , integral over a control angle of the direction cosines relative to x, y and z-axis particle size parameter [-] radiant fraction [-] array of variables defining the absorption coefficient, = { , , , } Ω solid angle [sr] Subscript Fuel direction j spectral line S soot at a given wavenumber Superscript aggregate lth direction (DOM) or lth control angle (FVM) mth direction (DOM) or mth control angle (FVM) primary particle Operators 〈 〉 Reynolds averaged quantity ′ Reynolds fluctuating quantity ̅ filtered (or resolved) quantity ′′ subgrid-scale (or residual) fluctuation Recently, quasi-MC methods [43], [44] were employed to solve RHT problems in 3D participating media, aimed at the improvement of the convergence rate, and therefore the computational efficiency. In these methods, the random numbers are replaced by low-

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“…At the same time, the ECU triggers the laser transmitter to emit a laser to trigger the camera to take a picture. The camera then sends the results back to the computer for storage, enabling a complete record of the diesel spray process [15][16][17].…”

Section: Experimental Conditionsmentioning

confidence: 99%

Experiment and Simulation Investigation on the Characteristics of Diesel Spray Impingement Based on Droplet Impact Phenomenon

Liu

et al. 2018

Applied Sciences

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Abstract:In order to study the characteristics of diesel spray impinging in small-size internal combustion (IC) engine, the laboratorial platform of spray impingement is used to visualize the droplet impact phenomenon. A high-speed camera is used to record the whole process of the spray. An experimental research is accomplished under the impingement phenomenon of diesel spray on the wall with a fixed injection volume of 25 mg, injection pressure of 40 MPa, wall-injector distance of 40mm and orifice diameter of 0.26 mm. The computational fluid dynamics (CFD) simulation is carried out and the turbulence kinetic energy (TKE) distribution diagram is obtained. The results show that the maximum spray radius is 29.3 mm and maximum spray height is 10.2 mm at 2.8 ms. The spray impingement phenomenon presents the "blanket" shape. The simulation results are similar to the experimental results with the average error of the spray height within 3%.

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Development of a multiphase photon Monte Carlo method for spray combustion and its application in high-pressure conditions

Cited by 12 publications

References 50 publications

Modeling Thermal Radiation in Combustion Environments: Progress and Challenges

Modeling Thermal Radiation in Combustion Environments: Progress and Challenges

The impact of radiative heat transfer in combustion processes and its modeling – with a focus on turbulent flames

Experiment and Simulation Investigation on the Characteristics of Diesel Spray Impingement Based on Droplet Impact Phenomenon

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