Why does a change in flow rate cause a change in pressure? Also, why isn’t it called oil shock pressure?
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Why does a change in flow rate cause a change in pressure? Also, why isn’t it called oil shock pressure?
A change in flow velocity can cause a change in pressure because, according to Bernoulli’s principle, as the flow velocity increases during fluid movement, kinetic energy increases while static pressure decreases, resulting in a decrease in total pressure. Conversely, as the flow velocity decreases, kinetic energy decreases, static pressure increases, and total pressure increases. As for why it is not called oil impact pressure, it is because the pressure changes caused by changes in flow velocity are not limited to liquids only, but also apply to gases and other fluids. Therefore, it is generally referred to as pressure change or dynamic pressure change, without specifying a particular fluid. .
Water hammer pressure is a general term; it refers to liquids, that is, fluids with a certain weight. According to Bernoulli’s equation, changes in the flow velocity of a liquid result in changes in pressure
Water hammer usually occurs in steam pipes; therefore, the water pressure caused by water hammer refers merely to liquids.