Abstract: Experiments on two:dimensional interactions of plane moving shocks with counter- and co-rotating vortex pairs were conducted in a shock tube with a square crosssection. The unsteady procedure of the interaction between shocks and vortex pairs was studied. The distortion of shock surface, forming of secondary shock and tri-point and interaction of shocks were discussed. The results show that the shock wave is distorted very much, strength of vortex is increased and shape of vortex core is changed, during the...