Is Total Pressure Different at Different Points Along a Pipe?

In summary, the total pressure in a closed system is a combination of static pressure and dynamic pressure. However, in a water pipe, the dynamic pressure remains constant while the static pressure varies. This is due to energy losses caused by friction and viscous effects. Pumps are used to input energy and maintain the total pressure in the system, but this is not always equal at different points due to head losses. Length of the system and other factors can also affect the total pressure.
  • #1
Yuri B.
137
0
Total pressure is a sum of the static pressure and the dynamic one, and is said to be the same along a pipe/duct.
In the water pipe gauge (static) pressure is maximal after the pump and minimal at the pipe outlet, but the speed and the density being the same, the dynamic pressure is the same everywhere. So, the total pressure is different at different points ?
 
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  • #2
Yes: In a real-world situation, the stream of water loses energy as it flows, due mostly to friction and viscous losses. This is why pumps require input energy.
 
  • #3
russ_watters EXCELLENT
 
  • #4
Does total pressure stay the same everywhere in a closed system ?
 
  • #5
Not according to Russ.
The loss as the flud moves down the pipe is called, well, head loss.
 
  • #6
The TP at discharge is not = the TP at suction ?
Why ?
 
  • #7
Yuri B. said:
The TP at discharge is not = the TP at suction ?
Why ?
That's the entire purpose of a pump.
 
  • #8
because u give the pump electric power and it transimits it to hydraulic power
thats the reason YURI
 
  • #9
I got it so: the first statement (in my OP) - which one can meet not once in the writings on the subject - is true conditionally for only short lengthes of a system where head losses are considered negligeable.
Thank you!
 
  • #10
my friend we always here neglect secondary losses like fittings and valves but length no and also it depends on the length ur talkin abt
 

What is hydraulic total pressure?

Hydraulic total pressure refers to the combined pressure exerted by both the static pressure and the velocity pressure of a fluid in a hydraulic system.

How is hydraulic total pressure calculated?

Hydraulic total pressure can be calculated by adding the static pressure, which is the pressure exerted by the weight of the fluid, to the velocity pressure, which is the pressure exerted by the movement of the fluid.

What is the unit of measurement for hydraulic total pressure?

The unit of measurement for hydraulic total pressure is typically pounds per square inch (psi) in the United States, or pascals (Pa) in other countries.

What is the significance of hydraulic total pressure in a hydraulic system?

Hydraulic total pressure is a crucial factor in determining the efficiency and performance of a hydraulic system. It helps to ensure that the system can generate enough force to operate equipment and maintain the desired flow of fluid.

How does hydraulic total pressure affect the design of hydraulic systems?

Hydraulic total pressure plays a significant role in the design of hydraulic systems, as it determines the size and strength of the components needed to withstand the pressure and flow requirements. It also helps to determine the proper pump size and flow rate for optimal system performance.

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