9/21/2023 0 Comments Centrifical pump for dredge![]() ![]() This principle explains why a moving stream of liquid or gas exerts less pressure than if it were at rest. ![]() An increase in the fluid’s speed must therefore be matched by a decrease in its pressure, i.e., energy is always conserved in a fluid stream. Originally formulated in 1738 by the Swiss mathematician and physicist Daniel Bernoulli, it states that the total energy in a steadily flowing fluid system is a constant along the flow path. The interplay of the three forms of fluid energy in a flowing stream is governed by Bernoulli’s principle. As a fluid flows down a pipe, ditch, or river, there is a constant interaction between these three forms of energy. Similarly, the greater the velocity of a stream of fluid, the higher its capability to do work. The greater a fluid stream’s pressure, the greater it’s potential to do work. The higher a liquid is stored, like water in a water tower, the greater its potential energy. ![]() There are three physical forms of a fluid energy: Elevation energy, pressure energy, and velocity energy. This bottleneck effect means that two pumps operating in parallel will always deliver less than twice the flow that one pump can deliver. The easiest way to understand system head is to remember that the discharge pipe size stays the same diameter and therefore tends to restrict the higher flow generated by two pumps operating in parallel. ![]()
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