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Institute of Turbomachinery and Fluid Dynamics
Logo Leibniz Universität Hannover
Institute of Turbomachinery and Fluid Dynamics
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Low-Speed Axial Compressor (LSAC)

Field of Applications

  • Research of aerodynamic effects on neighboring zones
  • Transition investigation
  • Investigation of aeroelastic fundamentals

Measurement Techniques

  • Steady and unsteady measurement techniques.
  • Temperature measurement techniques (Type K and PT100).
  • Torque shaft measurement techniques.
  • Acceleration sensors for vibration monitoring.
  • Hot-film array for wall shear stress measurements.
  • Radial-periphery pocket with steady and unsteady multi-hole probes behind each stator row.
  • Radial pocket with steady and unsteady multi-hole probes behind each rotor row.
  • CTA and CCA probes for measuring velocity vectors and flow field turbulence.
  • Strain gauge to measure blade vibrations.
  • Tip timing for blade vibration measurement.

Specifications

  • Output power: 
  • Rotational speed:
  • Mass flow:
  • Total pressure ratio:
  • No.  Stages:
  • Hub ratio:
  • Thickness-span ratio:
  • Axial velocity in meridian plane:
  1. 450 kW
  2. 3 000 rpm
  3. 16.5 kg/s
  4. 1.08
  5. 2
  6. 0.63
  7. 0.064 (Hub), 0.043 (Blade tip)
  8. 55.5 m/s

Description

The low-speed axial compressor (LSAC) was initially built to research the aerodynamic effects on surrounding zones. This two-stage axial compressor operates within a closed-loop circuit. In order to adjust and define the boundary conditions at the compressor inlet, the air temperature can be controlled and set as a constant in the condenser. The stator blades are instrumented with a hot-film array that allows the investigation of transition dependent on the upstream and downstream perturbations induced by the rotor blades. The low ratio of thickness and span of the LSAC allows the research of the fundamentals of aeroelasticity. Piezoelectric actuators are used to excite blade vibrations during the design concept. The rotor blade vibrations can then be measured by means of a strain gauge, and also through the tip-timing system.

Contact

Christopher Meinzer

 

Dipl.-Ing. Thomas Hauptmann