All Outputs (9)

H2/Air Autoignition Dynamics around the Third Explosion Limit (2018)
Journal Article
Tingas, E., Kyritsis, D. C., & Goussis, D. A. (2019). H2/Air Autoignition Dynamics around the Third Explosion Limit. Journal of Energy Engineering, 145(1), Article 04018074. https://doi.org/10.1061/%28asce%29ey.1943-7897.0000588

This paper examines the influence of wall reactions on the generation of the explosive time scale that characterizes ignition delay around the third explosion limit of a stoichiometric H2/air homogeneous mixture. The only wall reactions exhibiting a... Read More about H2/Air Autoignition Dynamics around the Third Explosion Limit.

Investigation of the turbulent flame structure and topology at different Karlovitz numbers using the tangential stretching rate index (2018)
Journal Article
Manias, D. M., Tingas, E., Hernández Pérez, F. E., Malpica Galassi, R., Paolo Ciottoli, P., Valorani, M., & Im, H. G. (2019). Investigation of the turbulent flame structure and topology at different Karlovitz numbers using the tangential stretching rate

Turbulent premixed flames at high Karlovitz numbers exhibit highly complex structures in different reactive scalar fields to the extent that the definition of the flame front in an unambiguous manner is not straightforward. This poses a significant c... Read More about Investigation of the turbulent flame structure and topology at different Karlovitz numbers using the tangential stretching rate index.

Three-stage heat release in n-heptane auto-ignition (2018)
Journal Article
Sarathy, S. M., Tingas, E., Nasir, E. F., Detogni, A., Wang, Z., Farooq, A., & Im, H. (2019). Three-stage heat release in n-heptane auto-ignition. Proceedings of the Combustion Institute, 37(1), 485-492. https://doi.org/10.1016/j.proci.2018.07.075

Multi-stage heat release is an important feature of hydrocarbon auto-ignition that influences engine operation. This work presents findings of previously unreported three-stage heat release in the auto-ignition of n-heptane/air mixtures at lean equiv... Read More about Three-stage heat release in n-heptane auto-ignition.

Issues arising in the construction of QSSA mechanisms: the case of reduced n-heptane/air models for premixed flames (2018)
Journal Article
Tingas, E., Diamantis, D. J., & Goussis, D. A. (2018). Issues arising in the construction of QSSA mechanisms: the case of reduced n-heptane/air models for premixed flames. Combustion Theory and Modelling, 22(6), 1049-1083. https://doi.org/10.1080/13647830

A model reduction methodology, based on the quasi steady-state approximation (QSSA), is employed for the construction of reduced mechanisms in the case of an n-heptane/air premixed flame. Several issues related to the construction of these reduced me... Read More about Issues arising in the construction of QSSA mechanisms: the case of reduced n-heptane/air models for premixed flames.

A computational analysis of methanol autoignition enhancement by dimethyl ether addition in a counterflow mixing layer (2018)
Journal Article
Song, W., Tingas, E., & Im, H. G. (2018). A computational analysis of methanol autoignition enhancement by dimethyl ether addition in a counterflow mixing layer. Combustion and Flame, 195, 84-98. https://doi.org/10.1016/j.combustflame.2018.03.037

To provide fundamental insights into the ignition enhancement of methanol (MeOH) by the addition of the more reactive dimethyl ether (DME), computational parametric studies were conducted in a one-dimensional counterflow fuel versus air mixing layer... Read More about A computational analysis of methanol autoignition enhancement by dimethyl ether addition in a counterflow mixing layer.

Computational singular perturbation analysis of super-knock in SI engines (2018)
Journal Article
Jaasim, M., Tingas, E., 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., 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., Hernández Pérez, F. E., Im, H. G., Galassi, R. M., Ciottoli, P. P., & Valorani, M. (2018). Analysis of Hydrogen/Air Turbulent Premixed Flames at Different Karlovitz Numbers Using Computational Singular Perturbation. In AIAA S

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.