Question
Download Solution PDFWhat is the relation between the delivery head of the centrifugal pump and the shaft speed (N)?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Some relations for Pumps is as follows,
- For Head H ∝ D2N2
- For Power P ∝ D5N3
- For Specific Speed = \({N_S} = \frac{{N\sqrt Q }}{{H_m^{3/4}}}\)
Head coefficient is given by,
\(\frac{{H}}{{{D^2}N^2}} = C\)
For Discharge in Pumps;
The dimensionless analysis of the centrifugal pumps proves that the discharge is written as
- Two geometrically similar pumps said to be homogeneous when
Q ∝ D3N
\(\frac{Q}{{{D^3}N}} = Constant\)
where Q = Flow rate, D = Diameter of the impeller, N = Rotational Speed.
Last updated on May 28, 2025
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