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HM 272 Air-Operated Reaction Turbine
Education / GUNT Hamburg / Fluid Mechanics and Hydrology / Hydraulic Fluid Energy Machines /


 This demonstration unit is part of an equipment series that facilitated investigations on pneumatically driven turbines. On the HM 272 unit, the characteristic behaviour of a reaction turbine can be investigated. For exact measurements the table unit is equipped with electronic sensors for recording temperature, speed and torque, the values recorded are indicated on digital displays. Inlet and outlet pressure at the turbine are indicated on easy to read dial instruments. The flow rate in the system is measured with a variable-area flowmeter. For the operation of the unit, a mains connection and a compressed air supply are required.

Learning Objectives / Experiments
· Determination of power as a function of volumetric flow rate, pressure and speed
· Recording of torque characteristic
· Determination of the turbine efficiency
[1] Table unit for the investigation of a reaction turbine with air flow
[2] l x w x h 900x370x750mm, approx. 35kg
[3] Compressed air supply 300ltr/h
[4] Max. turbine power output 50W at 40000rpm
[5] Wheel diameter 50mm
[6] Turbine loading using belt brake
[7] Moment measurement using force sensor
[8] Speed measurement with proximity switch
[9] Display of speed, moment and temperature on digital displays
[10] Display of the relevant pressures on dial instruments
[11] 230V, ~50Hz
Technical Data
Radial impulse turbine
Max. power: 25 W at 30000 rpm
Wheel diameter: 50mm
4 outlet nozzles, diameter of each 1.5mm

Measuring ranges
Temperature measurement –20...1100°C
Speed measurement 0...50000rpm
Torque measurement 0...10Ncm
Flow rate measurement 25...315 ltr/min
Inlet pressure measurement 0...2.5bar
Outlet pressure measurement 0...0.1bar
Dimensions and Weight
lxwxh : 900 x 370 x 750 mm
Weight : approx. 35 kg
Required for Operation
230V, ~50Hz, Compressed air supply 6...10 bar, max. 300ltr/min
Scope of Delivery
1 table unit, complete, 1 instruction manual
Order Details
070.27200 HM 272 Air-Operated Reaction Turbine