Mechanical Engineering - Hydraulic Machines - Discussion

Discussion Forum : Hydraulic Machines - Section 1 (Q.No. 35)
35.
When the speed of the pump increases, its net positive suction head (NPSH) requirement decreases.
Agree
Disagree
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
7 comments Page 1 of 1.

Omar al nawaisheh said:   9 years ago
Why when the speed of the pump increases, its net positive suction head (NPSH) requirement decreases? Disagree.

Aru said:   9 years ago
What is the NPSH?

Pratik said:   9 years ago
NPSH (Net Positive Suction Head).

The minimum pressure required at the suction port of the pump to keep the pump from cavitation.

Pradip Nohwar said:   8 years ago
Is it because NPSH remains constant?

Bhuppi said:   7 years ago
The required NPSH increases monotonically while the NPSH actual decreases, and when these two meet, the cavitation starts.

NPSH(required) = (P + v * v/2)inlet - P(vapour)/density.

Amr said:   7 years ago
Why?

Yash joshi said:   6 years ago
Power is directly proportional to speed. So more power products by pump for suction of low pressure liquid, when you increase speed. So not requirement of more npsh.

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