Numerical Simulations of Flow and Flame Characteristics of Double Cavity Trapped Vortex Combustor

This study utilizes numerical simulations to investigate combustion efficiency in a Double Cavity Trapped Vortex Combustor (DCTVC).The DCTVC, employing a double cavity design and a cavity stabilization concept, enhances flame stability and minimizes pressure drop, achieving optimal performance by injecting an appropriate mix of fuel and air into the first cavity.Vortices and eddies are utilized to achieve the greatest turbulent mixing in the DCTVC combustion chamber.Because turbulence is precisely contained inside the two chambers where reactants are introduced and effectively blended, this enhances the efficiency of the fuel and air blending process.The momentum flux ratio between the cavities and mainstream flow significantly impacts the flow structure in the cavity region under under-reacting flow circumstances.Studying NOx emissions in combustors is imperative due to their relationship with turbulence intensity, recirculation zones, and trapped vortex zones, which directly impact combustion efficiency and emission levels.Staged combustion systems, commonly associated with DCTVCs, exhibit the potential for a substantial 30% to 60% reduction in NOx emissions.A parametric study, varying parameter such as the cavity's geometry provides valuable insights in flow and flame structure, demonstrating the adaptability and efficiency of combustion in the DCTVC.