Underwater launching of supercavitating projectiles from laboratory bores of different lengths

Examples of experiments on underwater launching with the visualization of fastflowing high-energy processes accompanying the release of projectiles from accelerator channels of various lengths into the water are presented. The qualitative difference in the patterns of underwater firing during launching from the bores with accelerator channels of different lengths is revealed. The velocity of the front of the combustion products is obtained as a function of the muzzle velocity of the projectile. The intraballistic parameters of the firing process, which characterize the features of projectile launchers with accelerator channels of different lengths, are calculated.