Executive Summary : | In recent years, modern power plants have been adopting renewable and sustainable energy sources due to growing demand and limited fossil fuel sources. This has led to stricter limits on pollutant emissions from combustion in energy systems, resulting in fuel-lean combustion operations. However, this lean operation raises concerns about combustion stability issues. Hydrogen-enriched fuels and biofuels are renewable and can be adapted with minimal change in existing energy systems. This study aims to analyze the performance and stability of current systems with multi-component renewable fuels, focusing on their adaptability to fuel-flexible conditions. The second phase proposes new combustion systems that can provide maximum performance with controlled emission and dynamics under fuel-flexible conditions. A correlation map of combustion stability and emission for high-hydrogen fuels and biofuels will be plotted over a range of operating conditions from fuel-lean to fuel-rich limit conditions. The study selects hydrogen-enriched and biofuels based on their renewability and abundance, as their compositions have drastic variability that can affect combustor performance, stability, and emissions. To avoid instability, a correlation map based on combustion parameters like stability margins, equivalence ratio, thermal power, acoustic energy, and emissions will be developed. This will help optimize stable performance and emissions in multi-component renewable fuelled combustors. The study will extend this work to elevated pressure conditions, revealing the combustion dynamical behavior in near realistic operating conditions. These outcomes will play a critical role in designing efficient and stable combustor with controlled emission operating in fuel-flexible conditions. |