Comparison of Cavitation Erosion between Cavitating Jet and Vibratory Methods Specified in ASTM Standard

摘要

Cavitation erosion was compared between cavitating jet and vibratory methods. It was found that the erosion by cavitating jets occurs 8 to 10 times as fast as that by the vibratory, thus the cavitating jet method is effective for the acceleration test. The erosion mechanisms produced in both apparatuses are the same, judging from the time interval of bubble collapse impact loads and the shape of pits. It was concluded that erosion is evaluated by the accumulated summation of squares of impact loads, not by the accumulated volume of pits for which it is obtained from the pit on the material surface exposed to cavitation for 1-5 seconds.