Numerical Analysis of Combustion and Thermal Performance of a Bluff-Body and Swirl-Stabilized Micro-Combustor with Premixed NH3/H2/Air Flames

Energies, Journal Year: 2025, Volume and Issue: 18(4), P. 780 - 780

Published: Feb. 7, 2025

This research presents a novel bluff-body and swirl-stabilized micro-combustor fueled by an ammonia/hydrogen mixture, aimed at enhancing flame stabilization for zero-carbon micro-combustion-based power generators. Employing numerical simulations, the study examines effects of geometry, inlet mass flow rate, vane angle, combustor material on combustion thermal efficiencies. Key findings demonstrate that shape significantly influences outcomes, with cone-shaped designs showing lowest radiation efficiency among tested geometries. The identifies optimal rate 9×10−6 kg/s, which achieves 99% superior uniformity in mean outer wall temperature. While variations primarily affect NO emissions temperatures, they have minimal impact efficiency. Further analysis reveals adjusting angle from 15 to 60 degrees improves temperature uniformity, efficiencies, while also reducing emissions. 60-degree is particularly effective, achieving approximately 44% Additionally, selection plays pivotal role, silicon carbide outperforming others delivering optimized (approximately 910 K), (38.5%), most uniform Conversely, quartz exhibits lower performance metrics.

Language: Английский

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Performance Analyses of Telsa-valve Structured Meso-Combustors within Ammonia-Hydrogen/Air Combustion for Thermophotovoltaic Applications

Renewable Energy, Journal Year: 2025, Volume and Issue: 243, P. 122546 - 122546

Published: Jan. 31, 2025

Language: Английский

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A review of employed flame stabilization techniques in development of micro/mesoscale combustion-based direct energy conversion systems

Fuel, Journal Year: 2025, Volume and Issue: 392, P. 134444 - 134444

Published: March 5, 2025

Language: Английский

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