Author(s): Kunpeng Su; Jianhua Wu; Yu Wang; Fei Ma
Linked Author(s): Jianhua Wu, Fei Ma
Keywords: Ir entrainment; Air bubble size; Cavitation damage
Abstract: In order to determine the role of entrained air bubbles in reducing cavitation damage, the effects of air bubble size, air concentration and temperature on cavitation damage were experimentally investigated using a vibratory apparatus. Aeration sheets laser-drilled with tiny holes were specially made for injecting small air bubbles in large numbers. Test results demonstrate that smaller air bubbles, higher air concentration, and lower temperatures result in less cavitation damage. It is quite clear that not only the average air concentration but also the distribution of relatively small air bubbles near the solid surface makes a difference in mitigating cavitation damage.