- #1
de$per@do
- 4
- 0
In centrifugal pumps why diameter of delivery pipe is smaller than suction pipe?
cjl said:... Centrifugal pumps deliver fluid at a higher velocity than they intake, ...
gmax137 said:Well, pumps deliver at higher pressure than they intake. The outlet piping velocity will be dependent on the outlet pipe area (due to continuity), not the other way around.
The reason inlet piping is usually larger diameter than outlet piping is to minimize pressure losses upstream of the pump, in order to ensure the pump has adequate net positive suction head (to minimize cavitation in the pump).
Suction in fluid mechanics refers to the process of drawing or pulling a fluid into a confined space or through a tube or pipe. It occurs due to a difference in pressure between two points in the fluid, causing the fluid to flow from the high-pressure area to the low-pressure area.
Suction is created by creating a low-pressure area (vacuum) at one end of a tube or pipe, causing the fluid to flow from the high-pressure area to the low-pressure area. This can be achieved through various methods such as using a pump, creating a pressure difference using a piston, or using a suction cup.
Suction has various applications in fluid mechanics, including pumping fluids from one location to another, creating a vacuum to remove air or gases from a system, and lifting or moving objects using suction cups. It is also commonly used in medical procedures, such as blood transfusions and dialysis.
Bernoulli's principle states that as the speed of a fluid increases, its pressure decreases. This principle is often used to explain suction in fluid mechanics, as the low pressure created at one end of a tube or pipe causes the fluid to flow towards it from the high-pressure area, creating suction.
Fluid viscosity, or the resistance of a fluid to flow, plays a significant role in suction in fluid mechanics. In highly viscous fluids, the flow is slower, and it requires more force to create suction compared to low-viscosity fluids. This is because the fluid molecules in high-viscosity fluids are more tightly bound together, creating more resistance to flow.