Chemical Engineering - Fluid Mechanics - Discussion

Discussion Forum : Fluid Mechanics - Section 1 (Q.No. 10)
The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the
suction minus vapor pressure of the liquid at suction temperature.
discharge minus vapor pressure of the liquid at the discharge temperature.
Answer: Option
No answer description is available. Let's discuss.
7 comments Page 1 of 1.

Jomson Mathachan said:   5 years ago

When pumping liquids it is possible for local pressure inside the pump to fall below the vapour pressure of the liquid, it will cause the formation of bubbles (cavitation).

Janak pankhaniya said:   5 years ago
What is the cause of cavitation in a centrifugal pump?

Kaushlender kumar yadav said:   5 years ago
Pressure head is pressure per unit specific weight of fluid.P/ρ * g.
Whereas the velocity head is V^2/2g.

Arun said:   6 years ago
What is pressure head and velocity head?

Raj musale said:   9 years ago
We know as the temperature of fluid increases leads to cavitation which is undesired.

NPSH is basic analogy that states how close the fluid is near its boiling point. NPSHa should be always greater than NPSHr; if the NPSH of any pump is zero then it indicates that the temperature of fluid has reached to its boiling point resulting to cavitation in pipes.

B.Nath said:   1 decade ago
NPSH is related to temperature because vapor pressure is related to temperature and NPSH is related to vapor pressure.

YOGESH said:   1 decade ago
NPSH is related to the temperature?

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