Shock interaction phenomena

This thesis, divided into two parts, explores shock interaction phenomena occurring in high-speed platforms. part one focuses on shock-shock interactions (ssis), which manifest as a bi-stable system with either the regular interaction (ri) or the Mach interaction (mi) as outcomes. Through numerical simulations, both interaction types are examined in the presence of perturbations to provide insights into their stability characteristics and the riÕmi transition process, which exhibits hysteresis effects. Subsequently, attempts are made to replicate these hysteresis effects in the transonic–supersonic blow-down wind tunnel (tst-27) at tu Delft by continuously varying the free-stream Mach number during a run. The evolving shock system is continually tracked using a systematic post-processing methodology that integrates schlieren visualizations, synchronous pressure readings, and insights gained from a variable focal plane study conducted with a focusing schlieren system...