The specific speed can be made a truly dimensionless characteristic parameter while retaining the same numerical value by using following equation. Metric System Where Nq = Dimensionless parameter N = RPM of pump n = Rev/sec of Pump Q = Flow rate in m3/sec H = Head in meters g = Gravitat...
Mechanical work is a result of the energy exchange from the shaft to the fluid. The governing energy balance equation is ϕA+ϕB+Phydro=0, where: ΦAis the energy flow rate at portA. ΦBis the energy flow rate at portB. The pump hydraulic power is a function of the pressure differ...
determinetheefficiencyasafunctionofpoweroutput foranelectricmotor. Theory Apumpisadeviceforsupplyingenergytoafluid.Theeffectofsupplying energycanbestudiedviathemechanicalenergyequation. Thisequationneglectsallshearingstresses.Note:allnomenclatureisdefinedattheend ofthesection. Ingeneral,thepoweroriginatesfromapressure...
Pump efficiency,η (%)is a measure of the efficiency with which the pump transfers useful work to the fluid. η = Pout/ Pin(2) where η = efficiency (%) Pin= power input Pout= power output Related Topics Pumps Design of pumping systems and pipelines. With centrifugal pumps, displacement...
Parameter equation study for screw centrifugal pump [ J ]. Procedia engineering, 2012(31 ) :914 -921.Cheng Xiaorui;Li Rennian.Parameter equation study for screw centrifugal pump.Procedia Engineering.2012.914-921CHENGXiaorui,LIRennian.Parameterequationstudy forscrew centrifugalpump[J].Procediaengineering,...
A FASTCAM Mini AX 200 high-speed camera manufactured by Photron® was used to record the flow in the pump. The image resolution was 1024 × 960 pixels. The measurement expanded uncertainties were obtained according to the method recommended by JCGM (2008). Equation (3) was used to estimate...
Working Principle of Centrifugal Pump The first step of the working of the centrifugal pump is to provide mechanical power to its impeller by using an electric motor. The impeller, which is connected to the electric motor through the shaft, starts rotating. Due to the rotation of the impeller...
A formula for NPSHA can be stated as the following equation. When a centrifugal pump is taking suction from a tank or other reservoir, the pressure at the suction of the pump is the sum of the absolute pressure at the surface of the liquid in the tank plus the pressure due to the ele...
A centrifugal pump includes an impeller and a volute casing. The impeller comprises a main disc and a plurality of vanes which project axially from at least one side of the disc. A fluid passage is fo
Based on the N-S equation and the traditional k-εturbulent model,the SIMPLE method was applied to simulate the three-dimensional solid-liquid two-phase flow field in the centrifugal pump.The distributions of internal pressure and particle concentration were obtained under different concentrations of ...