Modeling ammonia-hydrogen-air combustion and emission characteristics of a generic swirl burner

Mazzotta, Luca, Lamioni, Rachele, D'Alessio, Francesco, Meloni, Roberto, Morris, Steven ORCID: https://orcid.org/0000-0001-5865-8911, Goktepe, Burak, Cerutti, Matteo, Romano, Christian, Creta, Francesco, Galletti, Chiara, Borello, Domenico and Valera-Medina, Agustin ORCID: https://orcid.org/0000-0003-1580-7133 2024. Modeling ammonia-hydrogen-air combustion and emission characteristics of a generic swirl burner. Journal of Engineering for Gas Turbines and Power 146 (9) , 091022. 10.1115/1.4064807

Full text not available from this repository.

Abstract

The combustion process of both pure NH3 and a NH3/H2 fuel blends is here analyzed using two kinetics processors, i.e., Chemkin-Pro-and CANTERA: detailed kinetic mechanisms have been tested and compared in terms of laminar flame speed and ignition delay time (IDT) with the aim to identifying the most suitable ones for the evaluation of NOx emissions. The generic swirl burner being used in Cardiff University's Gas Turbine Research Center has been considered as validation test case. In addition, this paper presents an experimental campaign followed by a computational fluid dynamics (CFD) approach for the assessment of NOx emission using axisymmetric Reynolds-Averaged Navier–Stokes (RANS) simulations, leading to a significant reduction of the computational time. Different pressures and mass flow rates are evaluated to understand correlations of NOx formation for pollutants reduction purpose. A direct comparison between experimental and numerical results is carried out in terms of flow field, flame shape, and NOx emissions. Results show that the increase in pressure from 1.1 bar to 2 bar results in reduction of NOx emissions from 2515 ppmv to 885 ppmv, also indicating guidelines for using a simplified RANS analysis, which leads to improved computational efficiency, allowing wide sensitivity and optimization analysis to support the design development of an industrial combustion system.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	American Society of Mechanical Engineers
ISSN:	0742-4795
Last Modified:	12 Jun 2024 12:46
URI:	https://orca.cardiff.ac.uk/id/eprint/168433

Actions (repository staff only)

Edit Item