Question

What is cavitation? How can it be avoided in reaction turbine ?
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Answer 1

Answer:

Here it is....

Explanation:

Cavitation is a phenomenon in which rapid changes of pressure in a liquid lead to the formation of small vapor-filled cavities in places where the pressure is relatively low. ... The process in which a void or bubble in a liquid rapidly collapses, producing a shock wave, is called inertial cavitation.

Answer 2

Answer:

Captivation is the formation of vapor bubbles. It can be avoided by appropriate runner speed and polished stainless steel blades.

Explanation:

• Heavy vibrations and noise are observed during cavitation.
• Efficiency and output are also reduced.

Captivation is the formation of vapor bubbles within a liquid at low-pressure regions that occur in locations in which the liquid has been increased to excessive velocities.

In reaction turbine by following methods we can avoid captivation:

1. We can use a turbine runner of stainless steel.
2. Runner blades should be polished.
3. By appropriate speed of the runner.