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Figure 12. Velocity trace with time for three different impeller types, A310 fluidfoil, A200 axial flow turbine and R100 radial flow turbine. The impellers are compared at equal discharge pumping capacity, equal diameter and at whatever speed is required to achieve this flow. The power required increases from left to right.

Figure 12. Velocity trace with time for three different impeller types, A310 fluidfoil, A200 axial flow turbine and R100 radial flow turbine. The impellers are compared at equal discharge pumping capacity, equal diameter and at whatever speed is required to achieve this flow. The power required increases from left to right.

As an example of other types of programs that can be worked on, Fig. 13 shows a velocity profile from an A410 impeller, Fig. 14, a map of the kinetic energy dissipation in the fluid stream and in the third one (Fig. 15) model of heavier than the liquid particles in a random tracking pattern.

Additional models can be made up using mass transfer, heat transfer and some reaction kinetics to simulate a process that can be defined in one or more of those types of relationships.

The laser velocity meter has made it possible to obtain much data from experiments conducted in transparent fluids. Figure 16 shows a typical output of such a measurement, giving lines that are proportioned to the fluid at that point and also relate to that angle of discharge. Studies on the blending and process performance of these various fluidfoil impellers will be covered in later sections of this chapter.

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A310 406 mm D

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