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Products  |  Thermal Engineering and HVAC  |  Power Engines and Machines  |  ET 796
ET 796 Gas Turbine Jet Engine Show data sheet (pdf file) Print page
Technical Description

Jet engines are gas turbines which generate a repulse. Jet engines are used on aircraft for propulsion due to their low weight and their high performance.
  The ET 796 trainer investigates the behaviour during operation of a jet engine.
  ET 796 includes the following components: jet engine (with compressor, annular combustion chamber, turbine and propelling nozzle), fuel system, starter and ignition system and measuring and control equipment. The gas turbine works as an open cyclic process, with the ambient air being drawn out and fed back in.
  In the jet engine the ambient air drawn in is first brought to a higher pressure in the single-stage radial compressor. In the downstream combustion chamber, fuel is added to the compressed air and the resulting mixture is combusted. The temperature and flow velocity of the gas increase. The gas flows out of the combustion chamber into the single-stage axial turbine and discharges a portion of its energy to the turbine. This turbine drives the compressor. In the propelling nozzle, the partially expanded and cooled gas expands to ambient atmospheric pressure and the gas accelerates to almost the speed of sound. The high-speed gas outflow generates the thrust. In order to reduce the outlet temperature, the exhaust gas stream is mixed with the ambient air in a mixing pipe. The gas turbine is started fully automatically with the aid of an electric starter.
  Between the compressor and the turbine is the annular combustion chamber. With optimum fuel utilisation, low pressure loss and good ignition properties, the ring shape is typical for the design used in jet engines.
  The movable turbine platform, with a force sensor, enables measurement of the thrust. The speed, temperatures and mass flow rates of the air and fuel are recorded and displayed using sensors. The measured variables can be processed on a PC. Typical characteristic values are determined.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
 

Learning Objectives / Experiments
- Behaviour during operation of a jet engine including
  start-up procedure
- Determination of the specific thrust
- Determination of the specific
  fuel consumption
- Determination of lambda (fuel-air ratio)
Features
* Gas turbine, operated as jet engine1
* Open gas turbine process1
Alternative products
ET 792 -- Gas Turbine
Specification
[1] Experiments relating to the function and behaviour during operation of a jet engine
[2] Gas turbine with radial compressor and axial turbine as jet engine
[3] Single-shaft engine
[4] Turbine mounted on moving base with force sensor for thrust measurement
[5] Electric starter for fully automatic start-up
[6] Additional remote control for display and control of the jet engine
[7] LabVIEW software for data acquisition via USB under Windows XP or Windows Vista
 
Technical Data
Jet engine
- max. thrust: 82N at 117,000rpm
- speed range 35,000...117,000rpm
- fuel consumption: max. 22L/h (full load)
- exhaust gas temperature: 610C
- sound level at 1m distance: max. 130dB(A)
Fuel: kerosene or petroleum + turbine oil
Starting system: electric starter 
Measuring ranges
- differential pressure: 0...150mbar
- combustion chamber pressure: 0...2.5bar
- temperature: 2x 0...1200C / 1x 0...400C
- speed: 0...120,000rpm
- fuel consumption: 0...25L/h
- force: 0...+/-200N
 
1 tank for fuel: 5L
 
Dimensions and Weight
l x w x h: 1000 x 800 x 1420 mm
Weight: approx. 135 kg
Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz, 1 phase or 120V, CSA, 1 phase
Ventilation 1000m/h, exhaust gas routing required
Scope of Delivery

1 trainer
1x turbine oil (250ml)
1  LabVIEW software CD + USB cable

1 set of instructional material
1 manufacturer's instruction manual (turbine)

Order Details
061.79600  ET 796  Gas Turbine Jet Engine
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© 2005 G.U.N.T. Gerätebau GmbH