Experimental Study on the Interaction of Planar Shock Wave with Square Helium Cylinder

摘要

Square helium cylinder has been formed by using thin pins as angular vertexes to connect the adjacent sides of polygonal soap films. The Richtmyer-Meshkov instability behavior of the helium cylinder has been studied in shock tube experiments. A set of high resolution schlieren frames showing the wave system and the interface evolution is gained by a high-speed schlieren system. Present study is the expansion of the classical RM instability of shock-bubble or shock-cylinder interaction. Other shapes of polygonal helium cylinders such as triangle, diamond and trapezoid will be formed and studied in the future.