Abstract
In order to enhance aggressive intensity of a cavitating jet in water, nozzle throat length L_t was optimized in a nozzle with cavitator. The aggressive intensity of the jet was evaluated by erosion test in aluminum plate specimens. The obtained results show that L_t = 5 mm is optimum nozzle throat length. Mass loss at optimum standoff distance of L_t = 5 mm nozzle is 20 % larger than that of L_t = 6 mm conventional nozzle.
