Wall-cooling for transition delay in crossflow-dominated boundary layers

Kurzfassung

This work will present results where the application of TSP is used to investigate thermal flow control. The focus will be on studying the impact of wall cooling in laminar-to-turbulent transition driven by stationary crossflow instabilities (S-CFI). For that purpose, a detailed parametric study is conducted, varying the cooling temperature ratio and DRE forcing parameters (amplitude and wavelength), with TSP measurements used to obtain accurate transition front location. Complementary HWA measurements, employing a V-wire probe configuration, will also be presented. The combined use of two-component HWA and TSP provides a comprehensive experimental dataset, enabling precise identification of the transition front and detailed analysis of both steady and unsteady perturbations in the streamwise (u) and spanwise (w) velocity components.