In volute casing the discharge area is more. so as per bernoulli's princi

In volute casing the discharge area is more. so as per
bernoulli's principle the pressure must be reduces also
from the basics, pressure = Force/Area. so pressure and
area are inversily proportional. By considering these two
basic rules pressure must be reduces. But in any
centrifugal pump, the pressure is increasing. How the
velocity is converted into pressure. In my view only head
is increases but how the pressure increases?

Question Posted / kumar

2 Answers
6613 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

In volute casing the discharge area is more. so as per bernoulli's principle the pressure mus..

Answer / sanjog,chaitanya

pressure=force/area cannot be applied for fluid dynamics.Its
valid only for fluid statics.
Actually flow rate is constant.Therefore when area
increases,velocity decreases.According to bernoulli's theorem,
P / ρg + v2/ 2g + z =constant,
If v decreases,pressure increases.

Is This Answer Correct ?

8 Yes

1 No

In volute casing the discharge area is more. so as per bernoulli's principle the pressure mus..

Answer / karthick

yes chaitanya you are right.while flowing thru the
centrifugal pump apply the continuity eqn that is mass flow
rate is constant as per continuity eqn,if area increases
velocity decreases so as per bernoulli's eqn this decrease
in velocity is converted into pressure energy.this pressure
energy rises the head.the volute casing is nothing but a
diffuser

Is This Answer Correct ?

6 Yes

0 No

Post New Answer

More Mechanical Engineering Interview Questions

Internal energy of a substance depends on

2 Answers Bhel,

• Why did you leave your last job?

1 Answers Petro Star Mount,

How cavitation can be eliminated by pump?

1 Answers

One TR = ?kacl/hour One US Gallon = ?liters

3 Answers Balco,

1 knots=?

6 Answers TVS,

Sir/Mam, I have applied for RRB chennai for the section engineer - mechanical posting. If any one is having the old written exam question papers please send it to my mail id : spramu@gmail.com Thanks in advance, Ramanathan...

0 Answers RRB,

why r u using enjine oil inside of diesel generaters.what is the uses & why r using diesel by pass filter. plese kindly answer me sir..?

0 Answers Cap Gemini,

The advantage of a controllable pitch propeller?

1 Answers

Which mechanism is used to hold the gear ?

3 Answers

i am P.SURESH(B.Tech-Mechanical) i need previous ouestion papers of NHPC-National Hydroelectric Power Corporation Limited,please get me.

1 Answers EIPRO, NHPC,

What does thermal diffusivity of metals signify.

0 Answers

what is the trignometry of lifting tools using the wire rope ? any formula for trignometry ?

0 Answers GE, ONGC,

For more Mechanical Engineering Interview Questions Click Here