Dynamics Analysis of a Turbulent Methane Flame in MILD Combustion Conditions
Conference Proceeding
Manias, D. M., Tingas, E., Im, H. G., & Minamoto, Y. (2019)
Dynamics Analysis of a Turbulent Methane Flame in MILD Combustion Conditions. In AIAA Scitech 2019 Forum. https://doi.org/10.2514/6.2019-1731
The dominant physical processes that characterize the combustion of a lean methane/air mixture, diluted with exhaust gas recirculation (EGR), under turbulent MILD premixed con...
H2/Air Autoignition Dynamics around the Third Explosion Limit
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), 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 stoic...
Investigation of the turbulent flame structure and topology at different Karlovitz numbers using the tangential stretching rate index
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 index. Combustion and Flame, 200, 155-167. https://doi.org/10.1016/j.combustflame.2018.11.023
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 ...
Three-stage heat release in n-heptane auto-ignition
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-stag...
Issues arising in the construction of QSSA mechanisms: the case of reduced n-heptane/air models for premixed flames
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/10.1080/13647830.2018.1470333
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 pre...
A computational analysis of methanol autoignition enhancement by dimethyl ether addition in a counterflow mixing layer
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 we...
Computational singular perturbation analysis of super-knock in SI engines
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...
CH4/air homogeneous autoignition: A comparison of two chemical kinetics mechanisms
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 diff...
Chemical kinetic insights into the ignition dynamics of n-hexane
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 ignit...
Analysis of Hydrogen/Air Turbulent Premixed Flames at Different Karlovitz Numbers Using Computational Singular Perturbation
Conference Proceeding
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 SciTech Forum. https://doi.org/10.2514/6.2018-0364
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 an...