Abstract
The cleaning technique with low environmental load is required in industrial field. The present study is proposes a water-jet containing microbubbles type cleaning technique. Microbubble with diameter of about 100μm is generated through Venturi tube. Behavior in the tube is observed with high-speed camera. Pressure on the simulated cleaning surface is measured with a diaphragm pressure gauge. Pressure fluctuation with spike-like shape is appeared under the condition of bubbly flow. It is suggested that peak pressure generate when bubbles shrink rapidly. Average pressure, standard deviation of it, peak pressure decrease with distance front the tube.
