Page 281 - Academic Press Encyclopedia of Physical Science and Technology 3rd Chemical Engineering
P. 281
P1: FYK/LPB P2: FPP Final
Encyclopedia of Physical Science and Technology EN006C-252 June 27, 2001 14:15
Fluid Mixing 81
◦
FIGURE 1 Three typical impellers for low and medium viscosity: (a) Axial flow, 45 blade (A200), (b) radial flow, disc
turbine (R100), and (c) fluidfoil axial flow impeller (A300).
FIGURE 2 Typical air foil profiles. (a) Proper blade angle of attack for minimum drag and maximum flow for a given
power. (b) Different blade angle of attack, giving higher drag coefficient and less flow per unit power.
