The National Center for Hypersonic Laminar-Turbulent Transition Research is dedicated to the theoretical, computational, and experimental studies of laminar-turbulent boundary-layer transition in the hypersonic regime. Our objectives are to (1) extend and enhance the theoretical framework to include relevant hypersonic physics and identify dominant instability modes in all regions; (2) perform fundamental stability experiments that will provide comprehensive validation for the theoretical framework; and (3) establish and demonstrate strategies for transition control. Our work explores instability-mode competition, receptivity, and the influence of thermochemical nonequilibrium, surface chemistry, ablation and surface roughness. These problems are inter-related and a systemic approach to prediction and control will integrate them during the lifetime of the Center.
Our team consists of highly regarded leaders in the transition community. Theoretical and computational work will be done at Texas A&M (TAMU), University of Arizona, and UCLA. Experiments are conducted in the NASA-Langley Mach 6 Quiet Tunnel located at Texas A&M University, the Mach 3.5 Quiet Tunnel at NASA Langley, the Texas A&M University Hypersonic Shock Tunnel, and the California Institute of Technology T5 Shock Tunnel.