Effect of microbubble injection on cavitation erosion

Sun, X.*; Naoe, Takashi; Futakawa, Masatoshi; Maekawa, Katsuhiro*

no journal, , 

Mercury target for pulsed spallation neutron source has been installed at the Materials and Life science experimental Facility (MLF) in the Japan Proton Accelerator Research Complex. At the moment of the proton beams bombard the target, pressure waves will be generated due to the thermal shock. On the process of the pressure wave propagation, negative pressure induces the cavitation which causes pitting damage on the inner surface of the target vessel. In the MLF, microbubbles injection into the flowing mercury is carrying out in order to mitigate the pressure waves. In this study, the effect of microbubbles on cavitation damage by microsecond-scale negative pressure was investigated through the vibratory horn tests in the bubbly water.