quick overview :
In impulse turbines, the working medium has the same static pressure in front of and behind the rotor. The conversion of pressure energy into kinetic energy takes place in the fixed nozzles of the distributor, not at the turbine rotor. This compressed-air driven experimental unit can be used to understand turbines powered by steam or water.
This a single-stage, axial impulse turbine. The turbine consists of a rotor that is installed inside a transparent housing, a distributor with four nozzles and a band brake for applying a load to the turbine. The number of active nozzles can be adjusted by means of the valves. The compressed air velocity is increased in the nozzles. The air flow that hits the blades generates an impulse that causes the rotor to start moving.
Learning Objectives/Experiments
Design and function of an impulse turbine
Determination of torque, power and efficiency
Graphical representation of characteristic curves for torque, power and efficiency
Investigation of the effect of nozzle pressure and number of nozzles
Specification
Investigation of a compressed air driven axial impulse turbine
Transparent front panel for observing the operating area
Distributor with 4 nozzles
Selectable number of nozzles
Applying a load to the turbine by using the band brake
Setting the primary pressure with the pressure reducing valve
Valve and flow meter for setting the flow rate
Solenoid valve as a safety device to prevent overspeed
Determination of the torque on the turbine shaft using a force sensor
Measurement of the turbine speed with an optical speed sensor
Manometer for displaying pressures on the inlet and outlet side
Digital display of speed, torque and temperature
Technical data
Axial impulse turbine
max. power: 50W at 15000min-1
Rotor
diameter: 55mm
number of blades: 28
Stator
4 nozzles, number can be selected
entry and exit angle: 20°
Measuring ranges
temperature: -20…1100°C
speed: 0…40000min-1
torque: 0…10Ncm
flow rate: 25…315L/min
inlet pressure: 0…2,5bar
outlet pressure: 0…0,1bar
primary pressure: 0…10bar
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
UL/CSA optional
Dimensions and weight
LxWxH: 780x370x660mm
Weight: approx. 35kg
Product
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