固体粒子が混入した水中でのキャビテーション・エロージヨン : 加速された粒子が含まれる場合

抄録

A new test apparatus was constructed by combining an ultrasonic vibratory cavitation device and a slurry jet device in order to study erosion in water containing solid particles. Erosion tests of stainless steel and carbon steel were carried out in tap water containing silica sands at the jet velocity of 015 m/s. When cavitation and slurry erosions are combined, the damage loss increases in proportion to time without an incubation period because solid particles remove the surface successively and do not coincide with simple summation of each damage loss. Under low jet flow velocity, cavitation erosion is decreased by solid particles. When jet flow velocity is high, cavitation bubbles flow out from the surface and the solid particles remove the plastic deformations which the erosion debries are produced, and thus the cavitation erosion is diminished.