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HM 270 Air-Operated Impulse 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 270 unit, the characteristic behaviour of an impulse 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 connection 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
· Partial pressurisation (nozzle group circuit)
[1] Table unit for the investigation of an axial impulse 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, 28 blades
[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
Axial impulse turbine
Max. power: 50 W at 40000 rpm
Wheel diameter: 50mm
Number of blades: 28
Inlet/outlet angle: 20°
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
l x w x h: 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
070.27000 HM 270 Air-Operated Impulse Turbine