Suction specific speed Calculator

✖The Angular Velocity of Centrifugal Pump refers to how fast the pump impeller rotates.ⓘ Angular Velocity [ω]			+10% -10%
✖Actual discharge at centrifugal pump outlet is the actual amount of the liquid outflow from the outlet of the centrifugal pump.ⓘ Actual Discharge at Centrifugal Pump Outlet [Q]			+10% -10%
✖The Net Positive Suction Head of Centrifugal Pump is the net head required to make the liquid flow through the suction pipe from the sump to the impeller.ⓘ Net Positive Suction Head of Centrifugal Pump [H_sv]			+10% -10%

✖Suction Specific Speed is defined as the value of speed of different machines operating with a similar degree of cavitation.ⓘ Suction specific speed [N_suc]

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Suction specific speed Solution

STEP 0: Pre-Calculation Summary

Formula Used

Suction Specific Speed = (Angular Velocity*sqrt(Actual Discharge at Centrifugal Pump Outlet))/((Net Positive Suction Head of Centrifugal Pump)^(3/4))
N_suc = (ω*sqrt(Q))/((H_sv)^(3/4))
This formula uses 1 Functions, 4 Variables

Functions Used

sqrt - A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number., sqrt(Number)

Variables Used

Suction Specific Speed - (Measured in Meter per Second) - Suction Specific Speed is defined as the value of speed of different machines operating with a similar degree of cavitation.
Angular Velocity - (Measured in Radian per Second) - The Angular Velocity of Centrifugal Pump refers to how fast the pump impeller rotates.
Actual Discharge at Centrifugal Pump Outlet - (Measured in Cubic Meter per Second) - Actual discharge at centrifugal pump outlet is the actual amount of the liquid outflow from the outlet of the centrifugal pump.
Net Positive Suction Head of Centrifugal Pump - (Measured in Meter) - The Net Positive Suction Head of Centrifugal Pump is the net head required to make the liquid flow through the suction pipe from the sump to the impeller.

STEP 1: Convert Input(s) to Base Unit

Angular Velocity: 179.07 Radian per Second --> 179.07 Radian per Second No Conversion Required
Actual Discharge at Centrifugal Pump Outlet: 0.056 Cubic Meter per Second --> 0.056 Cubic Meter per Second No Conversion Required
Net Positive Suction Head of Centrifugal Pump: 5.5 Meter --> 5.5 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

N_suc = (ω*sqrt(Q))/((H_sv)^(3/4)) --> (179.07*sqrt(0.056))/((5.5)^(3/4))

Evaluating ... ...

N_suc = 11.798989916916

STEP 3: Convert Result to Output's Unit

11.798989916916 Meter per Second --> No Conversion Required

FINAL ANSWER

11.798989916916 ≈ 11.79899 Meter per Second <-- Suction Specific Speed

(Calculation completed in 00.004 seconds)

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Created by Sagar S Kulkarni

Dayananda Sagar College of Engineering (DSCE), Bengaluru

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< Pump Parameters Calculators

Minimum speed for starting centrifugal pump

LaTeX Go Minimum Speed for Starting Centrifugal Pump = (120*Manometric Efficiency of Centrifugal Pump*Velocity of Whirl at Outlet*Diameter of Centrifugal Pump Impeller at Outlet)/(pi*(Diameter of Centrifugal Pump Impeller at Outlet^2-Diameter of Centrifugal Pump Impeller at Inlet^2))*((2*pi)/60)

Volumetric Efficiency of Pump given Discharge and Leakage of Liquid

LaTeX Go Volumetric Efficiency of Centrifugal Pump = Actual Discharge at Centrifugal Pump Outlet/(Actual Discharge at Centrifugal Pump Outlet+Leakage of Liquid from Impeller)

Output power

LaTeX Go Output Power of Centrifugal Pump = (Specific Weight of Fluid in Pump*Actual Discharge at Centrifugal Pump Outlet*Manometric Head of Centrifugal Pump)/1000

Angular Velocity of Centrifugal Pump

LaTeX Go Angular Velocity = (2*pi*Speed of Impeller in RPM)/60

Suction specific speed Formula

LaTeX Go

Suction Specific Speed = (Angular Velocity*sqrt(Actual Discharge at Centrifugal Pump Outlet))/((Net Positive Suction Head of Centrifugal Pump)^(3/4))
N_suc = (ω*sqrt(Q))/((H_sv)^(3/4))

What is the significance of Suction specific speed?

When the different machines have equal values of (Ns)suc., it indicates that the machines are operating with similar degree of cavitation.

How to Calculate Suction specific speed?

Suction specific speed calculator uses Suction Specific Speed = (Angular Velocity*sqrt(Actual Discharge at Centrifugal Pump Outlet))/((Net Positive Suction Head of Centrifugal Pump)^(3/4)) to calculate the Suction Specific Speed, Suction specific speed formula is defined as a dimensionless parameter that characterizes a pump's suction performance, providing a relative measure of the pump's ability to handle a given flow rate and head, allowing for the comparison of different pump designs and their suitability for specific applications. Suction Specific Speed is denoted by N_suc symbol.

How to calculate Suction specific speed using this online calculator? To use this online calculator for Suction specific speed, enter Angular Velocity (ω), Actual Discharge at Centrifugal Pump Outlet (Q) & Net Positive Suction Head of Centrifugal Pump (H_sv) and hit the calculate button. Here is how the Suction specific speed calculation can be explained with given input values -> 11.79899 = (179.07*sqrt(0.056))/((5.5)^(3/4)).

FAQ

What is Suction specific speed?

Suction specific speed formula is defined as a dimensionless parameter that characterizes a pump's suction performance, providing a relative measure of the pump's ability to handle a given flow rate and head, allowing for the comparison of different pump designs and their suitability for specific applications and is represented as N_suc = (ω*sqrt(Q))/((H_sv)^(3/4)) or Suction Specific Speed = (Angular Velocity*sqrt(Actual Discharge at Centrifugal Pump Outlet))/((Net Positive Suction Head of Centrifugal Pump)^(3/4)). The Angular Velocity of Centrifugal Pump refers to how fast the pump impeller rotates, Actual discharge at centrifugal pump outlet is the actual amount of the liquid outflow from the outlet of the centrifugal pump & The Net Positive Suction Head of Centrifugal Pump is the net head required to make the liquid flow through the suction pipe from the sump to the impeller.

How to calculate Suction specific speed?

Suction specific speed formula is defined as a dimensionless parameter that characterizes a pump's suction performance, providing a relative measure of the pump's ability to handle a given flow rate and head, allowing for the comparison of different pump designs and their suitability for specific applications is calculated using Suction Specific Speed = (Angular Velocity*sqrt(Actual Discharge at Centrifugal Pump Outlet))/((Net Positive Suction Head of Centrifugal Pump)^(3/4)). To calculate Suction specific speed, you need Angular Velocity (ω), Actual Discharge at Centrifugal Pump Outlet (Q) & Net Positive Suction Head of Centrifugal Pump (H_sv). With our tool, you need to enter the respective value for Angular Velocity, Actual Discharge at Centrifugal Pump Outlet & Net Positive Suction Head of Centrifugal Pump and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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