All Outputs (33)

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.

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.

Comparative investigation of homogeneous autoignition of DME/air and EtOH/air mixtures at low initial temperatures (2016)
Journal Article
Tingas, E., 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

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.

Ignition delay control of DME/air and EtOH/air homogeneous autoignition with the use of various additives (2015)
Journal Article
Tingas, E. A., Kyritsis, D. C., & Goussis, D. A. (2016). Ignition delay control of DME/air and EtOH/air homogeneous autoignition with the use of various additives. Fuel, 169, 15-24. https://doi.org/10.1016/j.fuel.2015.11.081

The effect of selected additives on the ignition delay of ethanol (EtOH)/air and dimethylether (DME)/air mixture is investigated. Computational Singular Perturbation (CSP) tools are utilized in an effort to determine algorithmically which species to... Read More about Ignition delay control of DME/air and EtOH/air homogeneous autoignition with the use of various additives.

The mechanism by which CH2O and H2O2 additives affect the autoignition of CH4/air mixtures (2015)
Journal Article
Manias, D. M., Tingas, E. A., Frouzakis, C. E., Boulouchos, K., & Goussis, D. A. (2016). The mechanism by which CH2O and H2O2 additives affect the autoignition of CH4/air mixtures. Combustion and Flame, 164, 111-125. https://doi.org/10.1016/j.combustflame

When the fast dissipative time scales become exhausted, the evolution of reacting processes is characterized by slower time scales. Here the case where these slower time scales are of explosive character is considered. This feature allows for the acq... Read More about The mechanism by which CH2O and H2O2 additives affect the autoignition of CH4/air mixtures.

Autoignition dynamics of DME/air and EtOH/air homogeneous mixtures (2015)
Journal Article
Tingas, E. A., Kyritsis, D. C., & Goussis, D. A. (2015). Autoignition dynamics of DME/air and EtOH/air homogeneous mixtures. Combustion and Flame, 162(9), 3263-3276. https://doi.org/10.1016/j.combustflame.2015.05.016

The autoignition kinetics of DME/air and EtOH/air stoichiometric mixtures are compared with the use of algorithmic tools from the CSP method at a range of initial conditions that refers to the operation of reciprocating engines. DME and EtOH are two... Read More about Autoignition dynamics of DME/air and EtOH/air homogeneous mixtures.