Fluid Mechanic - Pressure in the pipe

In summary, to calculate the pressure at the intersection of three centrifugal pumps, you will need to consider the discharge of each pump, the flow rate of each pump, and the pump curves. Without this information, it is not possible to accurately determine the pressure. It is recommended to consult the manufacturer for pump curves and obtain pressure readings at various points in the pipe for a more precise calculation.
  • #1
Arian DP
7
0
What should I consider if I have three centrifugal pumps then the water of these three pumps flow into one pipe? How to calculate the pressure in the intersection of the three pipes?Thank You.
 
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  • #2
The pressure at the intersection will be very close to the pressure at the discharge of any of your three pumps.

Are the pipe discharges from the pumps symmetrical (or similar) to the header (intersection)?
Do you know the flow rate of each pump (or the combination?)
Do you have a pump curve for the pumps? (if not ask the manufacturer)
Do you have any pressure readings the the pipe anywhere?
 
  • #3
The flow rate for three pumps are similar, 350m3/hour. And the diameter of pipe is 350 mm. Is it possible?
 
  • #4
Is what possible?

There is no way to mathematically determine the pressure at a given point in a pump system with just the flow rate. My question about the flow rates was leading toward the next question, do you have the pump curves for the centrifugal pumps. If they are putting out 350 m3/hr, then you need only look at the curves to determine the overall system pressure. You can work your way back from there.
 

Related to Fluid Mechanic - Pressure in the pipe

1. What is fluid mechanics?

Fluid mechanics is the study of how liquids and gases behave and interact with their surroundings. It is a branch of physics that focuses on understanding and analyzing the motion and forces of fluids, such as water, air, and oil.

2. What is pressure in a pipe?

Pressure in a pipe is the force per unit area that a fluid exerts on the walls of a pipe. It is caused by the weight of the fluid above it and the motion and collisions of molecules within the fluid.

3. How is pressure in a pipe calculated?

Pressure in a pipe can be calculated using the equation P = F/A, where P is pressure, F is force, and A is the cross-sectional area of the pipe. The force can be calculated using the weight of the fluid and the acceleration due to gravity, while the cross-sectional area can be measured or calculated.

4. What factors affect pressure in a pipe?

The pressure in a pipe is affected by the density and weight of the fluid, the velocity of the fluid, and the shape and size of the pipe. Other factors such as temperature, viscosity, and external forces can also impact pressure in a pipe.

5. How does pressure change in a pipe with changing fluid velocity?

According to Bernoulli's principle, as the fluid velocity increases, the pressure decreases. This is because the kinetic energy of the fluid increases, causing a decrease in potential energy and pressure. This relationship is known as the Bernoulli effect and is essential in understanding and designing fluid systems.

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