Author(s): Yu Wang, Jianhua Wu, Fei Ma, Kunpeng Su
Linked Author(s): Yu Wang
Keywords: Air entrainment, air bubble size, viscosity, cavitation erosion
Abstract: Air entrainment has been a simple and economic technology of protecting hydraulic facilities from cavitation erosion. However, the mechanisms of air entrainment against cavitation erosion are yet to be fully elucidated. In the present work, the experiments about the effect of air pressure, air bubble size and temperature of air-water mixture on cavitation erosion were conducted by means of a vibratory apparatus. Moreover, changes in viscosity of air-water mixture were investigated. The findings suggested that cavitation erosion decreases with high air pressure, small entrained air bubbles and low temperature. The increase of viscosity in air-water mixture upon air entrainment is the dominant mechanism of the observed suppression of cavitation damage
Year: 2017