Seung-Min JEONG, Inyoung YANG, Kyungjae LEE, Yang Ji LEE, Sanghoon LEE
DOI Number: N/A
Conference number: HiSST-2025-287
This study numerically investigates the flame evolution process in a tandem-cavity scramjet combustor for a Turbine-Based Combined Cycle (TBCC) engine. The combustor utilizes preheated kerosene, supplied via wall-mounted heat exchangers. The inflow conditions at the isolator inlet are a mass flow rate of 1.0 kg/s and a Mach number of 2.0. The simulation employed an Improved Delayed Detached Eddy Simulation (IDDES) model for turbulence and a quasi-laminar approach for chemistry. Spatial discretization was achieved using a fifth-order oMLP scheme for convective terms and a second-order central difference for viscous terms, while a second-order implicit LU-SGS scheme was used for time
marching. The results demonstrate successful flameholding in the first cavity and secondary combustion in the second cavity. However, insufficient fuel-air mixing was observed, attributed to interactions between the fuel streams. This numerical framework, having demonstrated its capability to capture the key combustion phenomena, will be applied to the design of a scaled-up combustor operating at a substantially higher mass flow rate.