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  • Rotating Stall test rig
  • Demonstation pumps test rig
  • Pump test rig
  • Pump turbine
  • Test stand for the investigation of jet free jets (Jet Improvement)
  • Pelton turbine test rig (horizontal shaft)
  • Nozzle flow
  • Test rig for monitoring suspended matter and cavitation
  • Water channel and hydrogen bubble flow visualization for a bionic fin with fin drive

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  1. Lucerne School of Engineering and Architecture Lucerne School of Engineering and Architecture
  2. About us About us
  3. Fluid Mechanics and Numerical Methods Fluid Mechanics and Numerical Methods
  4. Experimental analysis Experimental analysis
  5. Test rigs for research and education Test rigs for research and education
  6. Rotating Stall test rig Rotating Stall test rig

Rotating Stall test rig

Rotatable stable test stand

The operating range of a pump or compressor is limited due to the occurrence of instabilities such as rotating stall and surge. A model compressor, operating with water instead of air, is used for the investigation of such instabilities. 

The inlet pipe as well as the impeller casing are made out of plexiglas to allow observation and recording of the development of instability vortical structures. The rotational speed of the compressor is held low in order to achieve a better visualization of the flow as well as to ensure the similarity in Reynolds numbers between water and air flow. Transient pressure sensors further help measure the frequency and cell count of the rotating flow separations. 

Prof. Dr. Ernesto Casartelli

Head of CC FNUM

+41 41 349 32 36

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Lucerne School of Engineering and Architecture


Technikumstrasse 21
- 6048 Horw

+41 41 349 33 11

technik-architektur@hslu.ch

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