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Dr Stathis Tingas' Outputs (85)

Computational Investigation of Laminar Premixed Hydrogen/Ammonia Flames at Sub-Atmospheric Conditions (2025)
Presentation / Conference Contribution
Tule, D., & Tingas, E.-A. (2025, January). Computational Investigation of Laminar Premixed Hydrogen/Ammonia Flames at Sub-Atmospheric Conditions. Presented at AIAA SCITECH 2025 Forum, Orlando, Florida

The increasing urgency to address global warming has highlighted the need to explore alternative fuels for the transport sector, a significant contributor to carbonemissions. Hydrogen and ammonia have emerged as promising candidates, each with distin... Read More about Computational Investigation of Laminar Premixed Hydrogen/Ammonia Flames at Sub-Atmospheric Conditions.

A Computational Study of a Solid Oxide Fuel Cell-Turbofan Engine Hybrid Propulsion System Fueled by Ammonia and Hydrogen (2025)
Presentation / Conference Contribution
Wagner, L., & Tingas, E.-A. (2025, January). A Computational Study of a Solid Oxide Fuel Cell-Turbofan Engine Hybrid Propulsion System Fueled by Ammonia and Hydrogen. Presented at AIAA SCITECH 2025 Forum, Orlando, Florida

This study presents the theoretical evaluation of a hybrid aero-propulsion system that combines a Solid Oxide Fuel Cell (SOFC) with a commercial turbofan engine (JT9D), fuelled by an ammonia and hydrogen fuel blend, the latter produced by an onboard... Read More about A Computational Study of a Solid Oxide Fuel Cell-Turbofan Engine Hybrid Propulsion System Fueled by Ammonia and Hydrogen.

A computational study of the use of hydrogen peroxide as pilot fuel for a homogeneous mixture of ammonia/hydrogen in a compression ignition engine (2024)
Journal Article
Tingas, E.-A., Hardalupas, Y., & Taylor, A. M. K. P. (2024). A computational study of the use of hydrogen peroxide as pilot fuel for a homogeneous mixture of ammonia/hydrogen in a compression ignition engine. Journal of Ammonia Energy, 2(1), 42-63. https://doi.org/10.18573/jae.28

We report a computational investigation of a compression ignition (CI) engine (compression ratio: 17.6, displacement volume: 1.3 L) where the main fuel is a homogeneous mixture of ammonia (70-60% vol%) and hydrogen (30-40% vol%), with a global equiva... Read More about A computational study of the use of hydrogen peroxide as pilot fuel for a homogeneous mixture of ammonia/hydrogen in a compression ignition engine.

The mechanism of propagation of NH3/air and NH3/H2/air laminar premixed flame fronts (2024)
Journal Article
Tingas, E.-A., Gkantonas, S., Mastorakos, E., & Goussis, D. (2024). The mechanism of propagation of NH3/air and NH3/H2/air laminar premixed flame fronts. International Journal of Hydrogen Energy, 78, 1004-1015. https://doi.org/10.1016/j.ijhydene.2024.06.289

The mechanism of flame front propagation in NH3/air and NH3/H2/air steady, laminar premixed flames is examined. Since the process is characterised by a state of chemical non-equilibrium, the analysis focuses on the explosive mode that is introduced b... Read More about The mechanism of propagation of NH3/air and NH3/H2/air laminar premixed flame fronts.

Engine performance and emissions from a fumigated hydrogen/ammonia compression ignition engine with a hydrogen peroxide pilot (2024)
Journal Article
Paterson, G., Tingas, E.-A., Hardalupas, Y., & Taylor, A. M. (2024). Engine performance and emissions from a fumigated hydrogen/ammonia compression ignition engine with a hydrogen peroxide pilot. International Journal of Hydrogen Energy, 67, 334-350. https://doi.org/10.1016/j.ijhydene.2024.04.151

The study investigates, numerically, the potential use of introducing aqueous HO as an ignition promoter in a statistically homogeneous NH/H fuelled, medium speed (1250 rpm), 4-stroke, 1.3 litre cylinder displacement, mildly boosted CI engine with a... Read More about Engine performance and emissions from a fumigated hydrogen/ammonia compression ignition engine with a hydrogen peroxide pilot.

Asymptotic analysis of detonation development at SI engine conditions using computational singular perturbation (2023)
Journal Article
Dimitrova, I. D., Luong, M.-B., Sanal, S., Tingas, E.-A., & Im, H. G. (2024). Asymptotic analysis of detonation development at SI engine conditions using computational singular perturbation. Combustion Theory and Modelling, 28(3), 282-316. https://doi.org/10.1080/13647830.2023.2281379

The occurrence and intensity of the detonation phenomenon at spark-ignition (SI) engine conditions is investigated, with the objective to successfully predict super-knock and to elucidate the effect of kinetics and transport at the ignition front. Th... Read More about Asymptotic analysis of detonation development at SI engine conditions using computational singular perturbation.

Editorial: A glimpse of EVC2023 (2023)
Journal Article
Muhammad-Sukki, F., Bani, N. A., & Tingas, E.-A. (2023). Editorial: A glimpse of EVC2023. Transportation Research Procedia, 70, 1-4. https://doi.org/10.1016/j.trpro.2023.10.001

The Editorial describes the main aim and results of the 8th International Electric Vehicle Conference (EVC2023) held in Edinburgh Napier University, Edinburgh, United Kingdom from 21 – 23 June 2023.

Hydrogen: Where it Can Be Used, How Much is Needed, What it May Cost (2023)
Book Chapter
Tingas, E.-A., & Taylor, A. M. (2023). Hydrogen: Where it Can Be Used, How Much is Needed, What it May Cost. In E.-A. Tingas (Ed.), Hydrogen for Future Thermal Engines (3-64). Springer. https://doi.org/10.1007/978-3-031-28412-0_1

Although the subject of this book is hydrogen in Thermal Engines, neither the fuel nor the engines are widely commercially available at the time of publication: nor is it likely that this situation will change before the end of this decade. This notw... Read More about Hydrogen: Where it Can Be Used, How Much is Needed, What it May Cost.

Modelling the Transmission of Coxiella burnetii within a UK Dairy Herd: Investigating the Interconnected Relationship between the Parturition Cycle and Environment Contamination (2022)
Journal Article
Patsatzis, D. G., Wheelhouse, N., & Tingas, E.-A. (2022). Modelling the Transmission of Coxiella burnetii within a UK Dairy Herd: Investigating the Interconnected Relationship between the Parturition Cycle and Environment Contamination. Veterinary Sciences, 9(10), Article 522. https://doi.org/10.3390/vetsci9100522

Q fever infection in dairy herds is introduced through the transmission of the bacterium Coxiella burnetii, resulting in multiple detrimental effects such as reduction of lactation, abortions and chronic infection. Particularly in the UK, recent evid... Read More about Modelling the Transmission of Coxiella burnetii within a UK Dairy Herd: Investigating the Interconnected Relationship between the Parturition Cycle and Environment Contamination.

Computational investigation of ammonia-hydrogen peroxide blends in HCCI engine mode (2022)
Journal Article
Shafiq, O., & Tingas, E.-A. (2023). Computational investigation of ammonia-hydrogen peroxide blends in HCCI engine mode. International Journal of Engine Research, 24(5), 2279-2294. https://doi.org/10.1177/14680874221117686

The potential use of hydrogen peroxide as an ignition promoter to enable the use of ammonia in compression ignition engines is explored in the current study. A simplified numerical HCCI engine model within the Chemkin Pro suite is employed. The numer... Read More about Computational investigation of ammonia-hydrogen peroxide blends in HCCI engine mode.

Numerical analysis of zero-carbon HCCI engine fuelled with steam diluted H2/H2O2 blends (2022)
Journal Article
Fernie, O., Megaritis, T., Ganippa, L. C., & Tingas, E.-A. (2022). Numerical analysis of zero-carbon HCCI engine fuelled with steam diluted H2/H2O2 blends. Fuel, 326, Article 125100. https://doi.org/10.1016/j.fuel.2022.125100

The addition of hydrogen peroxide and steam to a hydrogen-fuelled HCCI engine was investigated at various fuel lean conditions ( = 0.2–0.6) and compression ratios (15–20) using a 0-dimensional numerical model. The use of hydrogen peroxide as an ignit... Read More about Numerical analysis of zero-carbon HCCI engine fuelled with steam diluted H2/H2O2 blends.

Computational analysis of an HCCI engine fuelled with hydrogen/hydrogen peroxide blends (2022)
Journal Article
Dimitrova, I. D., Megaritis, T., Ganippa, L. C., & Tingas, E.-A. (2022). Computational analysis of an HCCI engine fuelled with hydrogen/hydrogen peroxide blends. International Journal of Hydrogen Energy, 47(17), 10083-10096. https://doi.org/10.1016/j.ijhydene.2022.01.093

In the current work, Chemkin Pro's HCCI numerical model is used in order to explore the feasibility of using hydrogen in a dual fuel concept where hydrogen peroxide acts as ignition promoter. The analysis focuses on the engine performance characteris... Read More about Computational analysis of an HCCI engine fuelled with hydrogen/hydrogen peroxide blends.

Computational investigation of the chemical dynamics in detonation development at SI engine conditions (2021)
Presentation / Conference Contribution
Dimitrova, I. D., Sanal, S., Bau Luong, M., Tingas, S., & Im, H. G. (2021, November). Computational investigation of the chemical dynamics in detonation development at SI engine conditions. Paper presented at 74th Annual Meeting of the APS Division of Fluid Dynamics, Phoenix, Arizona

This study employs algorithmic tools from the computational singular perturbation (CSP) approach and statistics to investigate detonation development in SI engines using 2D simulations at different intensity levels – strong and mild detonations. The... Read More about Computational investigation of the chemical dynamics in detonation development at SI engine conditions.