Modern propulsion systems are looking at ways of achieving the conflicting requirement of reducing pollutant emissions, fuel burn and overall length of the propulsion system, without adversely impacting the overall performance. The efforts to reduce the length of the conventional combustor are being explored concurrently in different parts of the world, with application to both military and commercial propulsion system. Among the approaches seriously considered is Ultra-Compact Combustors (UCCs) which allows for aerodynamics integration of compression, combustion, and turbine airflows. The combination reduces airflow losses by decreasing flow angular momentum changes, resulting in a reduced pressure drop and greater engine performance in a decreased volume. The objective of the current research work is to study, and design trapped vortex combustor, which are being considered as one of the prime designs for UCC. The research work will focus on advancing the state of the art for TVC using additive manufacturing technique, by exploring different cavity shapes/cavity feed mechanism and its impact on vortex flow dynamics and overall flow field. It is also proposed to study the trade-off between combustor system performance, exit temperature quality, durability (thermal management) and efficiency, for a practical device using liquid fuel injection for a TVC