Abstract
A phenomenon of shock wave diffraction is often occurred by the explosions of combustible gases and cause serious damages around a source of the shock wave. Therefore it is important to investigate flow-fields behind diffracted shock wave. In this study, experiments are carried out to investigate the flow-field of shock wave diffraction in a Mach number ranged from 1.3 to 5.2. As a result, the behavior is agreed between experimental and numerical results and an empirical equation to evaluate maximum pressure produced by the reflection of diffracted shock wave is obtained.