Demonstration of the kickback of the reaction principle

Figure 5-4.—Demonstration of the velocity of the reaction principle. Figure 5-5.—Demonstration of the kickback of the reaction principle. The reaction turbine uses the reaction of a In the reaction turbine, steam jet to drive the rotor. You learned that an attached to the turbine casing act as nozzles and stationary blades impulse turbine increases the velocity of steam and transforms that potential energy under pressure into kinetic energy in a steam jet through nozzles. A forward force is applied to the steam to increase its velocity as it passes through the nozzle. From Newton’s third law of motion, you see that the steam jet exerts a force on the nozzle and an equal reactive force on the turbine blades in the opposite direction. THIS IS THE FORCE THAT DRIVES THE TURBINE. direct the steam to the moving blades. The moving blades mounted on the rotor act as nozzles. Most reaction turbines have several alternating rows of stationary and moving nozzle blades. You can use a balloon to demonstrate the kickback or reaction force generated by the nozzle blades (fig. 5-5). Blow up the balloon and release it. The air will rush out through the 5-3