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 1 of 4.
Bibin said:
1 decade ago
As per affinity law break horse power is directly proportional to cube of diameter or cube of rpm.
Safy said:
1 decade ago
According to the affinity laws horsepower is directly proportional to the fifth power of impeller diameter or cube of rpm, so this answer is not right.
Yogendra maurya said:
1 decade ago
POWER is proportional to Q.H=d^2.V^2=d^2.(pi.dN)^2=which is proportional to d^4.
Mohan said:
1 decade ago
Yes this answer is right but its against affinity laws, also discharge varies to square of this which is also against affinity law.
Afrasiyab said:
1 decade ago
Power is proportional to cube of diameter.
Radhika said:
1 decade ago
Cube of diameter. As per affinity laws option C is correct.
AMAL said:
10 years ago
@Safy.
I think its d^5.
Because p/(N^3*D^5) = Constant.
I think its d^5.
Because p/(N^3*D^5) = Constant.
Akshat said:
10 years ago
Answer D is correct, if there is a difference between the velocity triangles and if not then answer C is correct.
JAIMIN said:
10 years ago
I think D^5 is right answer.
Because from similarity law come the equation of power coefficient P/(N^3 D^5) that's it.
Because from similarity law come the equation of power coefficient P/(N^3 D^5) that's it.
Manthesh said:
9 years ago
I think C is the correct answer.
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