All Outputs (90)

Computational singular perturbation analysis of super-knock in SI engines (2018)
Journal Article
Jaasim, M., Tingas, E.-A., Hernández Pérez, F. E., & Im, H. G. (2018). Computational singular perturbation analysis of super-knock in SI engines. Fuel, 225, 184-191. https://doi.org/10.1016/j.fuel.2018.03.128

Pre-ignition engine cycles leading to super-knock were simulated with a 48 species skeletal iso-octane mechanism to identify the dominant reaction pathways that are present in super-knock. To mimic pre-ignition, a deflagration front was generated via... Read More about Computational singular perturbation analysis of super-knock in SI engines.

CH4/air homogeneous autoignition: A comparison of two chemical kinetics mechanisms (2018)
Journal Article
Tingas, E. A., Manias, D. M., Mani Sarathy, S., & Goussis, D. A. (2018). CH4/air homogeneous autoignition: A comparison of two chemical kinetics mechanisms. Fuel, 223, 74-85. https://doi.org/10.1016/j.fuel.2018.03.025

Reactions contributing to the generation of the explosive time scale that characterise autoignition of homogeneous stoichiometric CH4/air mixture are identified using two different chemical kinetics models; the well known GRI-3.0 mechanism (53/325 sp... Read More about CH4/air homogeneous autoignition: A comparison of two chemical kinetics mechanisms.

Chemical kinetic insights into the ignition dynamics of n-hexane (2018)
Journal Article
Tingas, E.-A., Wang, Z., Mani Sarathy, S., Im, H. G., & Goussis, D. A. (2018). Chemical kinetic insights into the ignition dynamics of n-hexane. Combustion and Flame, 188, 28-40. https://doi.org/10.1016/j.combustflame.2017.09.024

Normal alkanes constitute a significant fraction of transportation fuels, and are the primary drivers of ignition processes in gasoline and diesel fuels. Low temperature ignition of n-alkanes is driven by a complex sequence of oxidation reactions, fo... Read More about Chemical kinetic insights into the ignition dynamics of n-hexane.

Analysis of Hydrogen/Air Turbulent Premixed Flames at Different Karlovitz Numbers Using Computational Singular Perturbation (2018)
Presentation / Conference Contribution
Manias, D. M., Tingas, E.-A., Hernández Pérez, F. E., Im, H. G., Galassi, R. M., Ciottoli, P. P., & Valorani, M. (2018, January). Analysis of Hydrogen/Air Turbulent Premixed Flames at Different Karlovitz Numbers Using Computational Singular Perturbation. Presented at 2018 AIAA Aerospace Sciences Meeting, Kissimmee, Florida

The dynamics and structure of two turbulent H2/air premixed flames, representative of the corrugated flamelet (Case 1) and thin reaction zone (Case 2) regimes, are analyzed and compared, using the computational singular perturbation (CSP) tools, by i... Read More about Analysis of Hydrogen/Air Turbulent Premixed Flames at Different Karlovitz Numbers Using Computational Singular Perturbation.

Dynamical Analysis of Turbulent Premixed Hydrogen/Air Flames in the Thin Reaction Zone Regime (2017)
Presentation / Conference Contribution
Tingas, E., Kashtanov, R., Hernández Pérez, F., Im, H., Paolo Ciottoli, P., Malpica Galassi, R., & Valorani, M. (2017, December). Dynamical Analysis of Turbulent Premixed Hydrogen/Air Flames in the Thin Reaction Zone Regime. Paper presented at 11th Asia-Pacific Conference on Combustion, Sydney, Australia

Tingas, E., Kashtanov, R., Hernández Pérez, F., Im, H., Paolo Ciottoli, P., Malpica Galassi, R., & Valorani, M. (2017, December). Dynamical Analysis of Turbulent Premixed Hydrogen/Air Flames in the Thin Reaction Zone Regime. Paper presented at 11th A... Read More about Dynamical Analysis of Turbulent Premixed Hydrogen/Air Flames in the Thin Reaction Zone Regime.

Dynamical Analysis of Methanol-Dimethyl Ether Autoignition at Engine-Relevant Conditions (2017)
Presentation / Conference Contribution
Song, W., Tingas, E., & Im, H. (2017, December). Dynamical Analysis of Methanol-Dimethyl Ether Autoignition at Engine-Relevant Conditions. Paper presented at 11th Asia-Pacific Conference on Combustion, Sydney, Australia

Song, W., Tingas, E., & Im, H. (2017, December). Dynamical Analysis of Methanol-Dimethyl Ether Autoignition at Engine-Relevant Conditions. Paper presented at 11th Asia-Pacific Conference on Combustion, Sydney, Australia.

Investigation of Turbulent Hydrogen Premixed Flame Topologies at Different Combustion Regimes Using Computational Singular Perturbation (2017)
Presentation / Conference Contribution
Tingas, S., Hernandez Perez, F., & Im, H. (2017, November). Investigation of Turbulent Hydrogen Premixed Flame Topologies at Different Combustion Regimes Using Computational Singular Perturbation. Paper presented at 70th Annual Meeting of the APS Division of Fluid Dynamics, Denver, Colorado

The investigation of turbulent flames at higher Reynolds and Karlovitz numbers has been gaining research interest, due to the advances in the computational power that has facilitated the use of direct numerical simulations (DNS). One of the additiona... Read More about Investigation of Turbulent Hydrogen Premixed Flame Topologies at Different Combustion Regimes Using Computational Singular Perturbation.

The use of CO2 as an additive for ignition delay and pollutant control in CH4/air autoignition (2017)
Journal Article
Tingas, E. A., Im, H. G., Kyritsis, D. C., & Goussis, D. A. (2018). The use of CO2 as an additive for ignition delay and pollutant control in CH4/air autoignition. Fuel, 211, 898-905. https://doi.org/10.1016/j.fuel.2017.09.022

The effect of CO2 dilution on the adiabatic and isochoric autoignition of CH4/air mixtures is analyzed with Computational Singular Perturbation (CSP) algorithmic tools, with a particular emphasis on the determination of the features of the chemical d... Read More about The use of CO2 as an additive for ignition delay and pollutant control in CH4/air autoignition.

Dynamical System Analysis of a Turbulent Premixed Planar Hydrogen Flame in the Corrugated Flamelets Combustion Regime (2017)
Presentation / Conference Contribution
Tingas, E., Malpica Galassi, R., Paolo Ciottoli, P., Mukhadiyev, N., Im, H., & Valorani, M. (2017, September). Dynamical System Analysis of a Turbulent Premixed Planar Hydrogen Flame in the Corrugated Flamelets Combustion Regime. Paper presented at 10th Mediterranean Combustion Symposium, Naples, Italy

Tingas, E., Malpica Galassi, R., Paolo Ciottoli, P., Mukhadiyev, N., Im, H., & Valorani, M. (2017, September). Dynamical System Analysis of a Turbulent Premixed Planar Hydrogen Flame in the Corrugated Flamelets Combustion Regime. Paper presented at 1... Read More about Dynamical System Analysis of a Turbulent Premixed Planar Hydrogen Flame in the Corrugated Flamelets Combustion Regime.

A Computational Analysis of Autoignition of H2/Air Mixture with Temperature Fluctuations Using Computational Singular Perturbation (2017)
Presentation / Conference Contribution
Song, W., Tingas, E., Lee, S., & Im, H. G. (2017, July). A Computational Analysis of Autoignition of H2/Air Mixture with Temperature Fluctuations Using Computational Singular Perturbation. Paper presented at 26th International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS), Boston, USA

Song, W., Tingas, E., Lee, S., & Im, H. G. (2017, July). A Computational Analysis of Autoignition of H2/Air Mixture with Temperature Fluctuations Using Computational Singular Perturbation. Paper presented at 26th International Colloquium on the Dynam... Read More about A Computational Analysis of Autoignition of H2/Air Mixture with Temperature Fluctuations Using Computational Singular Perturbation.

Dynamics of n-Hexane/Air Low Temperature Autoignition (2017)
Presentation / Conference Contribution
Tingas, E., Wang, Z., Mani Sarathy, S., Im, H. G., & Goussis, D. A. (2017, July). Dynamics of n-Hexane/Air Low Temperature Autoignition. Paper presented at 6th International Workshop on Model Reduction in Reactive Flow (IWMRRF), Princeton, US

Tingas, E., Wang, Z., Mani Sarathy, S., Im, H. G., & Goussis, D. A. (2017, July). Dynamics of n-Hexane/Air Low Temperature Autoignition. Paper presented at 6th International Workshop on Model Reduction in Reactive Flow (IWMRRF), Princeton, US.

Ignition delay control through additives in DME/air and EtOH/air mixtures (2017)
Presentation / Conference Contribution
Tingas, S., Kyritsis, D. C., & Goussis, D. A. (2017, July). Ignition delay control through additives in DME/air and EtOH/air mixtures. Paper presented at 6th International Workshop on Model Reduction in Reactive Flow (IWMRRF), Princeton, US

Tingas, S., Kyritsis, D. C., & Goussis, D. A. (2017, July). Ignition delay control through additives in DME/air and EtOH/air mixtures. Paper presented at 6th International Workshop on Model Reduction in Reactive Flow (IWMRRF), Princeton, US.

Dynamical System Analysis of a Turbulent Premixed Planar Hydrogen Flame in the Corrugated Flamelets Combustion Regime (2017)
Presentation / Conference Contribution
Tingas, S., Galassi, R., Ciottoli, P., Mukhadiyev, N., Im, H., & Valorani, M. (2017, June). Dynamical System Analysis of a Turbulent Premixed Planar Hydrogen Flame in the Corrugated Flamelets Combustion Regime. Paper presented at 40th Meeting Italian Section of the Combustion Institute, Rome, Italy

Tingas, S., Galassi, R., Ciottoli, P., Mukhadiyev, N., Im, H., & Valorani, M. (2017, June). Dynamical System Analysis of a Turbulent Premixed Planar Hydrogen Flame in the Corrugated Flamelets Combustion Regime. Paper presented at 40th Meeting Italian... Read More about Dynamical System Analysis of a Turbulent Premixed Planar Hydrogen Flame in the Corrugated Flamelets Combustion Regime.

Flame Front Insights at Extreme Combustion Conditions (2017)
Presentation / Conference Contribution
Tingas, S., Mukhadiyev, N., & Im, H. (2017, May). Flame Front Insights at Extreme Combustion Conditions. Poster presented at Predictive Complex Computational Fluid Dynamics Conference, KAUST, Saudi Arabia

Tingas, S., Mukhadiyev, N., & Im, H. (2017, May). Flame Front Insights at Extreme Combustion Conditions. Poster presented at Predictive Complex Computational Fluid Dynamics Conference, KAUST, Saudi Arabia.

Investigation of the Unsteady Effects of Temperature Fluctuation on the Ignition of a Hydrogen-Air Mixture (2017)
Presentation / Conference Contribution
Song, W., Tingas, S., Lee, S., & Im, H. G. (2017, May). Investigation of the Unsteady Effects of Temperature Fluctuation on the Ignition of a Hydrogen-Air Mixture. Paper presented at 7th Annual Meeting of the Saudi Arabian Section of Combustion Institute, Saudi Arabia

Song, W., Tingas, S., Lee, S., & Im, H. G. (2017, May). Investigation of the Unsteady Effects of Temperature Fluctuation on the Ignition of a Hydrogen-Air Mixture. Paper presented at 7th Annual Meeting of the Saudi Arabian Section of Combustion Insti... Read More about Investigation of the Unsteady Effects of Temperature Fluctuation on the Ignition of a Hydrogen-Air Mixture.

Flame Front Insights at Extreme Combustion Conditions (2017)
Presentation / Conference Contribution
Tingas, S., Mukhadiyev, N., & Im, H. (2017, May). Flame Front Insights at Extreme Combustion Conditions. Poster presented at 7th SASCI Meeting, Saudi Arabian Section of the Combustion Institute, KAUST, Saudi Arabia

The objective of this work is to obtain physical understanding of a high Karlovitz premixed H2/air flame by using algorithmic tools of the computational singular perturbation (CSP) approach [1, 2]. On the top of these tools, a recently developed quan... Read More about Flame Front Insights at Extreme Combustion Conditions.

Comparative investigation of homogeneous autoignition of DME/air and EtOH/air mixtures at low initial temperatures (2016)
Journal Article
Tingas, E.-A., Kyritsis, D. C., & Goussis, D. A. (2017). Comparative investigation of homogeneous autoignition of DME/air and EtOH/air mixtures at low initial temperatures. Combustion Theory and Modelling, 21(1), 93-119. https://doi.org/10.1080/13647830.2016.1238513

The dynamics of homogeneous isochoric explosions of dimethylether (DME)/air and ethanol (EtOH)/air mixtures were studied and compared at relatively low initial temperatures (≤ 700 K) using algorithmic tools derived from the methodology of computation... Read More about Comparative investigation of homogeneous autoignition of DME/air and EtOH/air mixtures at low initial temperatures.

Algorithmic determination of the mechanism through which H2O-dilution affects autoignition dynamics and NO formation in CH4/air mixtures (2016)
Journal Article
Tingas, E. A., Kyritsis, D. C., & Goussis, D. A. (2016). Algorithmic determination of the mechanism through which H2O-dilution affects autoignition dynamics and NO formation in CH4/air mixtures. Fuel, 183, 90-98. https://doi.org/10.1016/j.fuel.2016.06.057

The Computational Singular Perturbation (CSP) algorithm is employed in order to determine how H2O-dilution influences ignition delay and chemical paths that generate NO during isochoric homogenous lean CH4/air autoignition. Regarding the ignition del... Read More about Algorithmic determination of the mechanism through which H2O-dilution affects autoignition dynamics and NO formation in CH4/air mixtures.

Unstable modes in bounded slow manifolds (2016)
Presentation / Conference Contribution
Manias, D., Tingas, S., & Goussis, D. (2016, June). Unstable modes in bounded slow manifolds. Paper presented at XXXVI Dynamics Days Europe, Corfu, Greece

The reactions contributing to the explosive time scale that characterises the autoignition of a homogeneous stoichiometric CH4/ air mixture are identified, using two different chemical kinetics mechanisms; the well known GRI-3 mechanism (5... Read More about Unstable modes in bounded slow manifolds.

Algorithmic Asymptotic Analysis of Autoigniting Systems (2016)
Thesis
Tingas, S. Algorithmic Asymptotic Analysis of Autoigniting Systems. (Thesis). National Technical University Of Athens. http://researchrepository.napier.ac.uk/Output/2676012

Using algorithmic tools derived from the methodology of Computational Singular Perturbation various autoignition problems are investigated. In the first problem, the autoignition kinetics of DME/air and EtOH/air stoichiometric mixtures are compared b... Read More about Algorithmic Asymptotic Analysis of Autoigniting Systems.