Print Email Facebook Twitter Numerical analysis of dilute methanol spray flames in vitiated coflow using extended flamelet generated manifold model Title Numerical analysis of dilute methanol spray flames in vitiated coflow using extended flamelet generated manifold model Author Bhatia, Bharat (Indian Institute of Technology Kanpur) De, Ashoke (Indian Institute of Technology Kanpur) Roekaerts, D.J.E.M. (TU Delft Fluid Mechanics) Masri, Assaad R. (University of Sydney) Date 2022 Abstract This work focuses on the large eddy simulation and the study of turbulent dilute methanol spray flames in vitiated coflow using the secondary-oxidizer Flamelet Generated Model (FGM). The modified FGM model uses an additional secondary oxidizer parameter in addition to the three other parameters previously used for spray flames - progress variable, mixture fraction, and enthalpy. The results for gas phase and droplet properties are validated against the dilute methanol spray flame database for varying fuel injection amounts. The droplet statistics and the liftoff flame heights are accurately captured for all the cases. A proper orthogonal decomposition (POD) of the scalar fluctuating hydroxyl radical (OH) field and the velocity-temperature field captures the flame structures in the downstream region of ignition kernels. The detailed POD analysis reveals that the base frequency of the dominant OH field equals that of the dominant vortical structure of 67.3 Hz. The flame propagation happens around these dominant vortical structures because of the less-strained fluid mixing. To reference this document use: http://resolver.tudelft.nl/uuid:54621a3a-e12b-4f36-bec7-ece8d06b506a DOI https://doi.org/10.1063/5.0098705 Embargo date 2023-07-01 ISSN 1070-6631 Source Physics of Fluids, 34 (7) Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2022 Bharat Bhatia, Ashoke De, D.J.E.M. Roekaerts, Assaad R. Masri Files PDF 5.0098705.pdf 5.41 MB Close viewer /islandora/object/uuid:54621a3a-e12b-4f36-bec7-ece8d06b506a/datastream/OBJ/view