Reaction turbine can be denned as a turbine with blades arranged to develop torque form gradual decrease of steam pressure from inlet to exhaust. When the velocity of a fluid is changed, the reaction forces are exerted like a simple nozzle when the fluid accelerated due to the changes in the cross sectional area. The kinetic energy of the fluid increases and since energy is conserved, the pressure of the fluid drops, This is meant that the pressure behind the fluid forces it through the nozzle causing it to speed up.The accelerated fluid in the direction of acceleration is required why force. Every force has an equal and opposite reaction so an equal and opposite force is exerted on the nozzle. There are three types of reaction turbine, in this experiment the radial flow reaction turbine been use. The radial flow reaction turbine has the liquid mainly in a plane perpendicular to the axis of rotation.
A reaction turbine is moved by 3 main forces which are: The reactive force produced on the moving blades as the gas increases in velocity as it expands through the nozzle-shaped spaces between the blades.The reactive force produced on the moving blades venue the gas changes direction The push or impulse of the gas impinging upon the blades. A reaction turbine is moved primarily by reactive force but also to some extent by direct impulse. Impulse and reaction blades can be combined to form an impulse-reaction turbine. This turbine combines the rotational forces Of the previously described turbines; that is, it derives its rotation from both the impulse of the gas striking the turbine blades and the reactive force Of the gas changing direction.
In real situation, reaction turbine been applied in industry and daily life. Some type of turbine been produced by electrical power, Most jet engines rely on turbines to supply mechanical work from their working fluid and fuel as do all nuclear warships and power plants. Below is the illustration of a reaction turbine that been used in this experiment. Figure 1. 0: Reaction turbine Newton’s third law describes the transfer of energy for reaction turbines, Whenever one body exerts force upon a second body, the second body exerts an equal and opposite force upon the first body.Error every action, there is an equal and opposite reaction. When the balloon is filled with air, potential energy gained and stored in the increased air pressure inside.
When you let air escape, it passes through the small opening. This represents a transformation from potential energy to kinetic energy OBJECTIVE The objectives of this experiment were: To study the characteristic curves of a reaction turbine, To explain the relation between speed and variable through the graph. To identify the types of turbines, To operate the reaction turbine. METHODOLOGY ApparatusFigure 2: Main connection of reaction turbine demonstration unit, The set up of the experiment consist of the following components: Figure 3 : Reaction Turbine Demonstration unit 1 Turbine Housing 9 Signal processing 2 Water feed Connection 10 Shaft seal 3 Braking device with torque sensor 1 1 Braking belt 4 Speed sensor 12 Belt pulley 5 Base plate 13 Guide pulley 6 Base plate bolts 14 Tensioning bolt 7 Turbine runner 8 Guide pulley PROCEDURE 15 Bolted bearing 16 Impeller shaft Start up procedures Water was filled in reservoir tank with water up to desired level then the imputer was switch on and HAMMY was click to run this experiment.The interface module was switch on and then the file name was created to store the result.
Experimental procedures The pump was switch on but makes sure the correct plug and the hand is dry, The floodwater and pressure was set slowly using Regulator valve. (range 2000 200). The HEM 288 software was start and waits and observed until the green light appear. The Tensioning Bolt was slowly tightly until the reaction turbine has Stop spinning.
The floodwater flow was check by referring in desktop and stops the footwear then retrieves the recorded data.