This video showcases how Flownex enables rapid concept design, analysis, and optimization of gas turbine combustors by combining fundamental fluid flow, heat transfer, and combustion modelling in a single simulation environment. The software predicts mass flow distribution, pressure losses, combustion performance, and material temperatures while supporting both steady-state and transient analyses such as fuel interruptions, air surges, and engine trips. Advanced combustion and heat transfer models allow engineers to evaluate complex combustor geometries, cooling strategies, and design modifications with high accuracy. Flownex also supports parametric studies and integration with CFD and FEA tools, helping reduce development time and cost during the design process. Beyond combustors, the platform can model turbine blade cooling, turbine structures, and complete Brayton cycle systems for comprehensive gas turbine analysis.