Francis Turbine
Categories: Engineering Lab EquipmentThe Francis turbine is part of the reaction turbines which convert the pressure energy of water into kinetic energy in the distributor and in the rotor. Francis turbines are used at medium heads and l...
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Description
The Francis turbine is part of the reaction turbines which convert the pressure energy of water into kinetic energy in the distributor and in the rotor. Francis turbines are used at medium heads and large flow rates. The turbine power is controlled by adjusting the guide vanes. In practice, Francis turbines are used in run-of-the river power plants and in storage power plants.
The Francis turbine is an accessory for the trainer. The experimental unit consists of the rotor, the distributor with adjustable guide vanes, a band brake for loading the turbine and the spiral housing with a transparent front panel. The transparent cover enables you to observe the water flow, the rotor and the guide vanes during operation. The angle of attack and the cross-section of flow are adapted to the speed and power of the turbine by adjusting the guide vanes.
Learning Objectives/Experiments
Determination of mechanical output
Determination of efficiency
Recording of characteristic curves
Investigation of the influence of the guide vane position on the power output
Velocity triangles
Specification
Recording the curves of a Francis turbine and investigating the influence of the guide vane position
Transparent front panel for observing the operating area
Loading the turbine by use of the band brake
Adjustable guide vanes for setting different angles of attack
Recording the torque via band brake and force sensor
Force sensor at the turbine inlet
Speed, torque and pressure displayed on the switch cabinet
Water supply, flow rate measurement and data processing software
Technical data
Turbine
output: approx. 350W at 1500min-1, 270L/min, H=15m
max. speed: 3000min-1
rotor
11 blades
medium diameter: 60mm
distributor
7 vanes
angle of attack: 0…20°
Measuring ranges
torque: 0…9,81Nm
pressure: 0…4bar abs.
speed: 0…4000min-1
quick overview :
The Francis turbine is part of the reaction turbines which convert the pressure energy of water into kinetic energy in the distributor and in the rotor. Francis turbines are used at medium heads and large flow rates. The turbine power is controlled by adjusting the guide vanes. In practice, Francis turbines are used in run-of-the river power plants and in storage power plants.
The Francis turbine is an accessory for the trainer. The experimental unit consists of the rotor, the distributor with adjustable guide vanes, a band brake for loading the turbine and the spiral housing with a transparent front panel. The transparent cover enables you to observe the water flow, the rotor and the guide vanes during operation. The angle of attack and the cross-section of flow are adapted to the speed and power of the turbine by adjusting the guide vanes.
Learning Objectives/Experiments
Determination of mechanical output
Determination of efficiency
Recording of characteristic curves
Investigation of the influence of the guide vane position on the power output
Velocity triangles
Specification
Recording the curves of a Francis turbine and investigating the influence of the guide vane position
Transparent front panel for observing the operating area
Loading the turbine by use of the band brake
Adjustable guide vanes for setting different angles of attack
Recording the torque via band brake and force sensor
Force sensor at the turbine inlet
Speed, torque and pressure displayed on the switch cabinet
Water supply, flow rate measurement and data processing software
Technical data
Turbine
output: approx. 350W at 1500min-1, 270L/min, H=15m
max. speed: 3000min-1
rotor
11 blades
medium diameter: 60mm
distributor
7 vanes
angle of attack: 0…20°
Measuring ranges
torque: 0…9,81Nm
pressure: 0…4bar abs.
speed: 0…4000min-1
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