長時間後のキャビテ-ション壊食面の形成と進展

抄録

Cavitation erosion often causes a leak of water in piping systems of industrial plants. Cavitation erosion tests were carried out for the S 15 C carbon steel equivalent to pipe steel STPG 370 under the condition of the stationary specimen test using the vibratory apparatus specified by ASTM G 32-03. Another test was performed using the cavitating liquid jet method by ASTM G 134-95 to simulate a flow condition. It was found that the maximum depth increases with erosion time with a power of about 0.5 and the erosion pit was formed locally with time by statistical analysis made on a Gumbel probability paper.