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Institute of Turbomachinery and Fluid Dynamics
Logo Leibniz Universität Hannover
Institute of Turbomachinery and Fluid Dynamics
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Burner Test Rig

Field of Application

  • Optical measurement of the influence of defects in the flame on the exhaust gas temperature profile
  • Validation of numerical simulation models

Measurement Techniques

  • PIV
  • BOS

Specifications

  • Number of modules:
  • Maximum thermal power:
  • Air mass flow:
  • Maximum pressure increase:
  • Air ratio:
  • Variable swirl:
  1. 4
  2. 450 kW
  3. 0.06 – 0.25 kg/s
  4. 1 bar (o)
  5. 1.5 - 2.5
  6. 0° - 45°

Description

The burner test rig is operated in cooperation with the Institute of Technical Combustion (ITV). It is used for scientific investigations of typical combustion phenomena and of the dissolvability of small-scale non-uniformities in (spatial) temperature profiles.

These non-uniformities arise from intentionally introduced disturbances, e.g. those arising from defects in combustion chambers of stationary gas turbines and jet engines. The burner consists of a pilot flame (diffusion flame) and main flame (premixed flame). A Roots-blower supplies the test rig with combustion air, set into rotation by a variable swirl generator and mixed with the gas of the main flame before the ignition in the pilot flame.

The air-cooled flame tube of the test rig consists of 4 segments. Each segment has a number of differently sized access points. In the first segment, optical studies with the particle image velocimetry (PIV ) can be performed directly on the flame through five optical access points of diameter 90 mm (see Figure 3). A special feature of the test bed is a segment with an integrated quartz-glass-tube (see Figure 1). This allows tomographic measurements using the background oriented schlieren method (BOS). The maximum wall-temperature of the segments, which are made of Alloy 800, is 800 °C. Al2O3 moldings can be used to increase the wall-temperatures up to 1 250 °C.

Contact

Dipl.-Ing. Ulrich Hartmann