E1C12 09/14/2010
13:54:12 Page 533
Water
inlets
Water
outlets
Smooth disk rotor
Trunnion
bearing
Trunnion
bearing
Seal
Water
outlet
(a) Viscous shear type
(b) Momentum exchange type
Water
inlets
Rotor pocket
Stator pocket
Seal
Figure 12.29 Waterbrake
dynamometers. (Courtesy of
the American Society of
Mechanical Engineers, New
York, NY. Reprinted from PTC
19.7-1980 6.)
12.2 Sensors 533