Multi-exposure visualization of supersonic two-phase flows impinging on a plate

Abstract

Supersonic particle-laden jets impinging on plates are considered. Resulting flow fields include unsteady shock waves of complex structures that are formed in the impingement zone. The difficulty of a mathematical description of such flows requires experimental measurements covering a wide range of parameters. The present work was carried out in the context of investigating the cold spray deposition method. In this method a compressible gas flow laden with solid particles is used. The importance of the character of jet-substrate interactions, the influence of particles on shock structures, particle velocities and trajectories, and particle distributions and concentrations both, in the jet and ahead the substrate, need to be studied. For this purpose we have developed a diagnostic system that is based on the method of multi-exposure visualization.