Summary of Cavitation! explained HD

00:00:00 - 00:00:00

The video explains how cavitation works, and how it can be used to reduce noise from a propeller. The Pennsylvanian's engineers have developed a propeller with four additional specially shaped blades that generate large amounts of thrust but at much lower speeds, which reduces cavitation and noise.

• 00:00:00 In this video, a propeller is shown spinning quickly, producing bubbles. These bubbles are not filled with air, but with steam. At a reduced pressure, the water boils, producing bubbles of steam. Cavitation only occurs when a propeller spins quickly, and slowing the propeller down reduces cavitation and therefore noise. However, slowing the propeller also reduces a submarine's thrust. To overcome this problem, the Pennsylvanian's engineers developed a unique propeller with four additional specially shaped blades that generate large amounts of thrust but at much lower speeds. This way, the Pennsylvanian produces almost no cavitation or propeller noise.