Author(s): Kunpeng Su; Jianhua Wu; Dingkang Xia; Zhiyu Ding
Linked Author(s): Jianhua Wu
Keywords: Cavitation erosion; Particle suspensions; Particle size; Particle concentration; Viscosity
Abstract: Although the main properties of solid particles that influence cavitation erosion in particle-laden liquids have been extensively studied, the mechanisms behind the part that solid particles play remain poorly understood, and little work has been done to clearly identify the relationship between the erosive wear and particle size or concentration. Cavitation erosion of AISI 1045 carbon steel was studied in the presence of SiO2 microparticles suspended in transformer oil, and 5 diameters (10 μm, 25 μm, 60 μm, 85 μm, and 100 μm) were investigated over a range of concentrations (0.005 v/v, 0.01 v/v, 0.02 v/v, 0.05 v/v, 0.1 v/v and 0.2 v/v). The test results indicate that material removal gets more severe at low concentrations and is reduced at high concentrations; at moderate concentrations, the large particles aggravate erosion while small ones mitigate. Possible influencing mechanisms at given particle sizes and particle concentrations have also been proposed.