Mazzotta, Luca, Meloni, Roberto, Lamioni, Rachele, Ansari, Naseem, Orsino, Stefano, Morris, Steven  ORCID: https://orcid.org/0000-0001-5865-8911, Goktepe, Burak, Mashruk, Syed, Valera Medina, Agustin ORCID: https://orcid.org/0000-0003-1580-7133 and Borello, Domenico
2025.
NOx emission measurement and numerical validation for cracked ammonia combustion in a semi industrial burner design.
Journal of Engineering for Gas Turbines and Power
, GTP-25-1241.
10.1115/1.4069482
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Abstract
Ammonia cracking is a promising solution for the abatement of the NOx emissions since it allows to partially avoid the fuel bound formation pathway. With regard to the numerical models, the growing interest in ammonia combustion highlights the need for methods that are able to predict the intricate NOx emissions production. In this work, the experimental measurements of a semi-industrial burner operated in non-premixed mode and fed with a mixture corresponding to 99% of cracked ammonia will be presented. The experimental measures aim to characterize both the flame morphology, and the pollutant emissions. Different operating pressures will be explored with the thermal power of the rig remaining constant. Three test conditions will be simulated by Large-Eddy Simulation (LES) relying on a pre-tabulated approach for turbulence-chemistry interaction. The main goal of the numerical campaign is the prediction of the flame shape at the different operating conditions. Conversely, LES won't be used for the assessment of the pollutant emissions, but they will support a Chemical Reactor Network (CRN) built at this scope. The time averaged fields coming from the Computational Fluid Dynamic model will be leveraged to set up the network and retrieve the trend of the main pollutant emissions. The flexibility of this methodology allows for detailed sensitivity to the chemical mechanism, with a focus on Rate of Production (ROP) analysis of the main NOx-forming reactions. This will allow for in-depth investigation of the dominant pathways of NOx formation.
| Item Type: | Article |
|---|---|
| Date Type: | Published Online |
| Status: | In Press |
| Schools: | Schools > Engineering |
| Additional Information: | License information from Publisher: LICENSE 1: URL: https://www.asme.org/publications-submissions/publishing-information/legal-policies, Start Date: 2025-08-23 |
| Publisher: | American Society of Mechanical Engineers |
| ISSN: | 0742-4795 |
| Date of Acceptance: | 28 July 2025 |
| Last Modified: | 01 Sep 2025 13:30 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/180791 |
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