Numerical Simulation of a Hydrogen-Fueled Dual-Mode Scramjet Engine Using Wind-US

&Simulations of the direct-connect, dual-mode, hydrogen-air scramjet engine at University of Virginia (UVA)’s Supersonic Combustion Facility were conducted using Wind-US flow solver. Detailed flowfield simulation results were directly compared to experimental data to evaluate the accuracy of the numerical model and provide insight into the experimental flowfield behavior. Four hydrogen-air reaction mechanisms were initially evaluated using the Burrows-Kurkov supersonic combustion benchmark case, from which the EvansSchexnayder mechanism with third-body efficiencies was then selected for UVA engine simulations. Results presented include one fuel-off and two reacting cases with different equivalence ratios, all with clean (nonvitiated) supply air. The strong sensitivity of the simulation results to the choice of turbulent Schmidt number was also demonstrated.