Impeller discharge rate

Impeller Discharge Rate and Fluid Head for Turbulent Flow. 18-11... 

The impeller discharge rate can be increased at the same power consumption by increasing impeller diameter and decreasing rotational speed and peripheral velocity so that N D is a constant (Eq. 18-4)]. Flow goes up, velocity head and peripheral velocity go down, but impeller torque Tq goes up. At the same torque, N D is constant, P and Q <=< Dl. Therefore, increasing impeller diameter at... 

With more specific reference to agitated systems, information is lacking on the effects of gas bubbles on basic properties like mean flow pattern, impeller discharge rate, or turbulence characteristics. The observations presented in Section II, based mainly on one-liquid-phase data, must therefore be considered as the best available approximations for the flow regimes in gas-liquid agitated systems. There have been a few papers of somewhat basic nature with direct application to these systems and these will be discussed in the remainder of this section. 

The impeller discharge rate can be increased at the same power consumption by increasing impeller diameter and decreasing rotational speed and peripheral velocity so that is a constant (Eq. 

Turbines, propellers, and paddles power = 0.2 to 1.5 kW/m for mixing liquids with impeller discharge rate >20 x liquid flow rate into tank. Heat transfer, 0.4 to 2 kW/m but don t neglect heat input from the mixer mass transfer 2 to 4 kW/mT Turbines, propellers, and paddles power = 1 to 4 kW/m for mass transfer. Air agitation diffused air 0.3 to 0.5 NdmVs-m 1.5 to 6 dmVs m... 

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