【Daily Question】Deep Processing 20160728: What is \"cavitation\"?
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To boost popularity and enhance technical exchanges among sea enthusiasts, we are starting to publish 【Question of the Day】 from today. Participation earns 4 points of wealth! 10 wealth points as a reward for correct answers or in-depth discussions! :lol Question: What is \"cavitation\"? Answer: Cavitation refers to the impact phenomenon caused by the vaporization and condensation of a liquid. ============================= Promotion of petrochemical activities: ☛Notice on the launch of the large-scale event “I’m saving energy; where are you?” in the petrochemical area: http://bbs.hcbbs.com/thread-1579199-1-1.html (Source: Haichuan Chemical Forum). This event offers awards in both text and image categories. When there are over 200 entries, an additional grand prize will be awarded, worth 600 Haichuan coins; if there are more than 300 entries, the grand prize value increases to 1,000 Haichuan coins, and for 500 entries it rises to 1,500 Haichuan coins. First prize: 3 Haichuan commemorative water cups; second prize: 5 winners, each receiving 120 Haichuan coins; excellence awards: several winners, each receiving 200 wealth points. --------------------------------------------------------------- ☛“My facility, my home” – Photo competition (10 wealth points per photo): http://bbs.hcbbs.com/thread-1495069-1-1.html (Source: Haichuan Chemical Forum)
Cavitation is surface damage caused by the relative movement between a solid surface and a liquid, and it typically occurs on the surfaces of water pump components, turbine blades, and ship propellers. A phenomenon of cavernous corrosion and damage occurring on the metal surface in contact with the fluid under conditions of high flow velocity and pressure changes. It often occurs in high-speed depressurization zones such as at the tips of centrifugal pump blades, where cavitation forms. These cavities are destroyed in high-pressure areas, generating shock pressures that destroy the protective film on the metal surface, thereby accelerating corrosion. Cavitation is characterized by the formation of many small pitting on the metal surface, which then gradually expand into cavities.
The liquid being pumped vaporizes on the impeller of the centrifugal pump, generating numerous bubbles that exert pressure on the impeller. This is because when a centrifugal pump operates at high speeds, the pressure on the surface of the blades is lower than the vapor pressure of a certain component or the average component in the liquid being transported.
Liquids along with trapped gases cause impact corrosion on equipment due to explosions.
Cavitation is also known as aerocavitation or void corrosion. A phenomenon of cavernous corrosion and damage occurring on the metal surface in contact with the fluid under conditions of high flow velocity and pressure changes. It often occurs in high-speed depressurization zones such as at the tips of centrifugal pump blades, where cavitation forms. These cavities are destroyed in high-pressure areas, generating shock pressures that destroy the protective film on the metal surface, thereby accelerating corrosion. Erosion by cavitation is characterized by the formation of many small pitting on the metal surface, which then gradually expand into cavities.
Cavitation is a phenomenon of cavernous corrosion and damage on the metal surfaces in contact with a fluid, occurring under conditions of high fluid flow and pressure changes.
At a certain temperature, when the pressure is reduced to the vaporization pressure at that temperature, bubbles form in the liquid. This phenomenon of bubble formation is called cavitation.
Cavitation； Cavitation erosion), also known as cavitation or void corrosion. A phenomenon of cavernous corrosion and damage occurring on the metal surface in contact with the fluid under conditions of high flow velocity and pressure changes. It often occurs in high-speed depressurization zones such as at the tips of centrifugal pump blades, where cavitation forms. These cavities are destroyed in high-pressure areas, generating shock pressures that destroy the protective film on the metal surface, thereby accelerating corrosion. Erosion by cavitation is characterized by the formation of many small pitting on the metal surface, which then gradually expand into cavities.
At a certain temperature, when the pressure is reduced to the vaporization pressure at that temperature, bubbles form in the liquid. This phenomenon of bubble formation is called cavitation.
Cavitation: A phenomenon of cavitative corrosion and damage on the metal surfaces in contact with the fluid, occurring under conditions of high fluid flow and pressure changes. It often occurs in the high-speed pressure reduction zone at the tip of centrifugal pump blades
Cavitation occurs most frequently in pump systems. When cavitation takes place in pumps, they fail to deliver the required flow rate and generate significant noise. The common causes of this issue include too low a liquid level or an excessive amount of inert gases