Ebrahim Abtahizadeh - Academia.edu (original) (raw)

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Papers by Ebrahim Abtahizadeh

Research paper thumbnail of Flamelet generated manifold simulation of highly swirling spray combustion: Adoption of a mixed homogeneous reactor and inclusion of liquid-flame heat transfer

AIP Advances

We undertake the modeling of the combustion of highly swirling fuel sprays using the Flamelet-Gen... more We undertake the modeling of the combustion of highly swirling fuel sprays using the Flamelet-Generated-Manifold (FGM) combustion-chemistry-reduction technique, especially the use of adiabatic tables generated with non-premixed chemical reactors. Preceding investigations indicated that tables thus generated can present uncertainties when used for predicting the finite-rate phenomena and different flame modes, and these are important for better prediction of spray flames in gas turbines. Thus, to address these, we have adopted a mixed-homogeneous chemical reactor that is applicable to both pre-mixed and non-premixed reactions and evaluated this using detailed computations of a constant-pressure mixed reactor. In addition, we have included curated levels of flame-liquid heat gain and loss in the generation of the FGM libraries and analyzed the effects on the major species formation. The methodologies were then incorporated into a Reynolds-averaged-Navier-Stokes model to analyze the da...

Research paper thumbnail of Flamelet generated manifold simulation of highly swirling spray combustion: Adoption of a mixed homogeneous reactor and inclusion of liquid-flame heat transfer

AIP Advances

We undertake the modeling of the combustion of highly swirling fuel sprays using the Flamelet-Gen... more We undertake the modeling of the combustion of highly swirling fuel sprays using the Flamelet-Generated-Manifold (FGM) combustion-chemistry-reduction technique, especially the use of adiabatic tables generated with non-premixed chemical reactors. Preceding investigations indicated that tables thus generated can present uncertainties when used for predicting the finite-rate phenomena and different flame modes, and these are important for better prediction of spray flames in gas turbines. Thus, to address these, we have adopted a mixed-homogeneous chemical reactor that is applicable to both pre-mixed and non-premixed reactions and evaluated this using detailed computations of a constant-pressure mixed reactor. In addition, we have included curated levels of flame-liquid heat gain and loss in the generation of the FGM libraries and analyzed the effects on the major species formation. The methodologies were then incorporated into a Reynolds-averaged-Navier-Stokes model to analyze the da...

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