Image measurement of shock wave flow field at outlet of large diameter explosion shock tube
To capture schlieren images of explosion shock waves over a large field of view and analyze the flow field evolution after shock wave interaction with a model,a reflective high-speed schlieren measure-ment technique based on focused schlieren was developed.The system uses a laser source and high reflec-tive film for input.By simplifying the knife-edge grid design,the shock wave flow field evolution at the out-let of a long-distance,large-aperture explosion shock tube and its high-resolution interaction with a solid model are achieved.At a distance of over 80 m,shock wave characteristics were obtained from a large-cali-ber,high-yield explosion shock tube with a 6 m×3 m field of view,along with high temporal and spatial resolution images and state data regarding interactions with solids.The study shows that the designed fo-cused schlieren system is simpler,more feasible,and offers a longer test distance and wider field of view than traditional systems.By altering the light source input,the benefits of a laser source for long-distance imaging are explored.The interaction between the shock wave front and the solid model reveals the forma-tion,evolution,and flow state of the shock wave on the model.These measurements provide visual data to support the evaluation and response analysis of weapons and equipment subjected to shock waves.
focus schlierenlarge field of viewshock wave imageexplosive shock tube
万方数据
维普
