Abstract
The imploding detonation of a propane-oxygen mixture was used to generate underwater shock waves in a sample holder. We used the three kinds of experimental apparatuses whose the inner diameters of main combustion chamber are 60 mm, 150 mm, and 400 mm. The experimental results show that maximum pressure at the implosion center was 150 to 18000 times higher than the initial pressure. Although the maximum pressure in the exit of a sample holder changes with the sizes of experimental apparatus, pressure increase speed is almost constant. We found that the peak pressure in the end of a sample holder can be increased by expansion of the size of the main combustion chamber, and that we can perform scale-up and automatic operation of sterilization equipment.
