Validation of a stochastic breakup model for turbulent jets in high-speed crossflow: assessment of turbulent interactions and sensitivity to boundary conditions

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dc.contributor.authorZghal, Malika
dc.contributor.authorSun, Xiaoxiao
dc.contributor.authorGauthier, Pierre Q.
dc.contributor.authorSethi, Vishal
dc.date.accessioned2023-04-26T08:37:56Z
dc.date.available2023-04-26T08:37:56Z
dc.date.issued2023-04-25
dc.description.abstractImproving the mixing of fuel and air by injecting a turbulent liquid fuel jet into a high-speed cross-flowing gas can reduce the emissions of gas turbine applications. To facilitate and hasten the development of such low-emissions technologies, accurate predictions of the spray characteristics are needed. The objective of the present study is to validate the predictive capabilities of a stochastic breakup model for turbulent transverse jets over a wide range of representative pressures and atomization characteristics. The effect of turbulence modeling is also assessed to provide accurate and computationally less expensive Eulerian−Lagrangian transient approaches. To do so, the predictions made with the large eddy simulation (LES) approach for different subgrid-scale (SGS) models and with the synthetic eddy method (SEM) are compared to the ones made using the unsteady Reynolds-averaged Navier-Stokes (RANS) approach with and without a turbulent dispersion model. The sensitivity of the numerical methodology to the upstream velocity profile, pressure, and momentum flux ratio were also assessed. Properly accounting for the upstream gas velocity profile was found to be critical to ensure accurate predictions of the spray characteristics. The unsteady RANS (URANS) turbulent approach coupled with the turbulent dispersion model showed good agreement with experimental data, but the LES approach tends to overpredict the spray penetration and underpredict the Sauter mean diameter (SMD). This could be due to the lower turbulent interactions it predicts, which may lead to lower momentum transfer between the phases.en_UK
dc.identifier.citationZghal M, Sun X, Gauthier PQ, Sethi V. (2023) Validation of a stochastic breakup model for turbulent jets in high-speed crossflow: assessment of turbulent interactions and sensitivity to boundary conditions. Atomization and Sprays, Volume 33, Issue 4, 2023, pp. 25-54en_UK
dc.identifier.eissn1936-2684
dc.identifier.issn1044-5110
dc.identifier.urihttps://doi.org/10.1615/AtomizSpr.2023041220
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/19543
dc.language.isoenen_UK
dc.publisherBegell Houseen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectliquid jeten_UK
dc.subjectcrossflowen_UK
dc.subjecthigh pressureen_UK
dc.subjectsecondary breakupen_UK
dc.subjectstochasticen_UK
dc.subjectturbulent dispersionen_UK
dc.subjectsimulationsen_UK
dc.subjectCFDen_UK
dc.subjectLESen_UK
dc.subjectunsteady RANSen_UK
dc.titleValidation of a stochastic breakup model for turbulent jets in high-speed crossflow: assessment of turbulent interactions and sensitivity to boundary conditionsen_UK
dc.typeArticleen_UK

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