Exploring a new criterion to determine the onset of cavitation in centrifugal pumps from energy-saving standpoint; experimental and numerical investigation

Investigation on the cavitation characteristic of a novel cylindrical rotational hydrodynamic cavitation reactor

“…Hydrodynamic cavitation is a transient phase transition phenomenon [2] , [3] , [4] . At the beginning, scholars' research on hydrodynamic cavitation mainly focused on how to reduce the negative effects of cavitation on centrifugal pumps, ship propellers, and other mechanical equipment such as erosion, vibration, and noise [5] , [6] , [7] , [8] . However, with the deepening of study, researchers have found that the huge energy generated by the collapse of cavitation bubbles can break the chemical bonds of water molecules and produce hydroxyl radicals (•OH) with strong oxidation, which has been effectively applied in the fields of biodiesel preparation, organic degradation of wastewaters, chitosan nanoparticle synthesis, and so on [9] , [10] , [11] , [12] , [13] .…”