Mechanical Engineering - Hydraulic Machines - Discussion
Discussion Forum : Hydraulic Machines - Section 1 (Q.No. 1)
1.
Power required to drive a centrifugal pump is directly proportional to __________ of its impeller.
Discussion:
34 comments Page 2 of 4.
Manish said:
9 years ago
Note that there are two sets of affinity laws:.
Affinity laws for a specific centrifugal pump - to approximate head, capacity and power curves for different motor speeds and /or different diameter of impellers.
Affinity laws for a family of geometrically similar centrifugal pumps - to approximate head, capacity and power curves for different motor speeds and /or different diameter of impellers.
Affinity laws for a specific centrifugal pump - to approximate head, capacity and power curves for different motor speeds and /or different diameter of impellers.
Affinity laws for a family of geometrically similar centrifugal pumps - to approximate head, capacity and power curves for different motor speeds and /or different diameter of impellers.
Pabitra said:
9 years ago
Fifth power of diameter will be the correct answer.
Vinit said:
9 years ago
The Correct answer will be d^5.
Jigar k patel said:
9 years ago
Correct Ans is C.
Law 2c Power is proportional to the cube of impeller diameter (assuming constant shaft speed):
{\displaystyle {P_{1} \over P_{2}}={\left({D_{1} \over D_{2}}\right)^{3}}} {P_{1} \over P_{2}}={\left({D_{1} \over D_{2}}\right)^{3}}.
Law 2c Power is proportional to the cube of impeller diameter (assuming constant shaft speed):
{\displaystyle {P_{1} \over P_{2}}={\left({D_{1} \over D_{2}}\right)^{3}}} {P_{1} \over P_{2}}={\left({D_{1} \over D_{2}}\right)^{3}}.
Indrajeet said:
9 years ago
According to affinity law of pump.
Power is directly proportional to the fifth Power of diameter.
Power is directly proportional to the fifth Power of diameter.
Dipanjan said:
9 years ago
I agree @Sreeejith.
Sai khelwane said:
7 years ago
Answer D is correct.
Sreejith said:
10 years ago
Power is proportional to fifth power of diameter.
Bibin said:
1 decade ago
As per affinity law break horse power is directly proportional to cube of diameter or cube of rpm.
Subrata said:
10 years ago
Not right.
The correct answer Will be d^5.
The correct answer Will be d^5.
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