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Lookup NU author(s): Professor Nilanjan ChakrabortyORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2024 The Author(s)In this study, Direct Numerical Simulations are utilized to investigate turbulent premixed NH3/air flames assisted by two distinct methods: non-equilibrium nanosecond plasma discharges and preheating, while maintaining equal input energy levels for both methods. The results show that plasma is more effective than preheating in increasing the turbulent burning velocity, namely by up to 31% under lean and by 26% in rich conditions. Furthermore, the flame structure is less affected by turbulence when using plasma. A negative correlation between flame displacement speed and local flame curvature is observed for all cases. Furthermore, negatively curved parts of the flame front are dominated by the reaction mode of combustion. In contrast, the positively curved parts are controlled by flame propagation mode in both preheated and plasma-assisted cases. It is shown that, when plasma is utilized, NO emissions are less sensitive to local heat release rate, and the amount of NO emissions is found to be 19% lower in comparison to the preheated case.
Author(s): Shahsavari M, Chakraborty N, Zhong S, Valera-Medina A, Jangi M
Publication type: Article
Publication status: Published
Journal: Fuel
Year: 2025
Volume: 381
Issue: Part D
Print publication date: 01/02/2025
Online publication date: 11/11/2024
Acceptance date: 04/11/2024
Date deposited: 19/11/2024
ISSN (print): 0016-2361
ISSN (electronic): 1873-7153
Publisher: Elsevier Ltd
URL: https://doi.org/10.1016/j.fuel.2024.133645
DOI: 10.1016/j.fuel.2024.133645
Data Access Statement: Data will be made available on request.
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