Question
Download Solution PDFThe specific speed, (NS) of a Centrifugal Pump is given by
(where, Hm is the available head from the pump and Q corresponding to the maximum efficiency of the pump at its normal working speed N)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
- The specific speed of a centrifugal pump is defined as the speed of a geometrically similar pump which would deliver one cubic metre of liquid per second against a head of one metre.
- \({N_s} = \frac{{N\sqrt Q }}{{H_m^{3/4}}}\)
Important Points
- The specific speed (Ns) of a turbine is defined as, the speed of a geometrically similar Turbine that would develop unit Power (P) when working under a unit Head (H) (1 m head).
- Specific speed for the turbine is given by:
- \({N_s} = \frac{{N\sqrt P }}{{{H^{\frac{5}{4}}}}}\)
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