Skin-Friction-Based Identification of the Critical Lines in a Transonic, High Reynolds Number Flow via Temperature-Sensitive Paint

In this contribution, three methodologies based on temperature-sensitive paint (TSP) data were further developed and applied for the optical determination of critical locations flow separation reattachment in compressible, high Reynolds number flows. The rely skin-friction extraction approaches low-speed flows, which adapted work to study presence shock-wave/boundary-layer interaction. a first approach, topological maps obtained from time-averaged surface temperature distributions, thus enabling identification lines as converging diverging lines. other two approaches, identified propagation celerity perturbations, determined time-resolved TSP data. experiments conducted at freestream Mach 0.72 chord 9.7 million Transonic Wind Tunnel Göttingen VA-2 supercritical airfoil model, was equipped with exchangeable modules specifically designed transonic, tests. via different TSP-based shown be mutual agreement, also found agreement reference experimental numerical