Effect of Swirl Structure on Flame Stability in Pulverized-Coal Ammonia Co-Firing and Ammonia Sole-Firing under Load Variation

Key Points

• The study aims to analyze how swirl structure affects flame stability during coal and ammonia combustion.
• Utilized various swirl numbers to determine their effect on flame behavior.
• Measured angular and axial momentum fluxes to assess combustion stability.
• Evaluated different fuel injection strategies to optimize flame stability.
• Increased swirl number enhances flame stability during co-firing.
• Optimal momentum flux levels correlate with improved combustion performance.
• Flame behavior changes significantly under varying load conditions.