Summary During the collapse of the bubble, due to the periodic change of the bubble center pressure, the surrounding water flow point has a huge repeated impact, causing mechanical erosion and chemical corros
During the collapse of the bubble, due to the periodic change of the bubble center pressure, the surrounding water flow point has a huge repeated impact, causing mechanical erosion and chemical corrosion damage to the turbine over-current metal surface, called the cavitation of the Water Turbine.
Airfoil (blade) cavitation: Cavitation generated at the back outlet of the runner blade is related to blade shape and working conditions.
Gap cavitation: When water flows through the gap and the smaller channel, the local flow rate increases, and the pressure decreases to cause cavitation.
Cavitation cavitation: In non-optimal conditions, the water flow rotates in the draft tube to form a symmetric vacuum vortex, causing water flow velocity and pressure pulsation in the draft tube, causing cavitation damage at the inlet of the draft tube, which may cause The draft tube vibrates.
Local cavitation: cavitation caused by the outflow of the overcurrent components due to outflow.
