Burner Test Rig

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.

Field of Application

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

Description

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.

Picture - Side view through an optical access to the flame during operation Picture - Side view through an optical access to the flame during operation Picture - Side view through an optical access to the flame during operation
Side view through an optical access to the flame during operation
Picture - Flame pipe of the burner test stand with built-in glass segment Picture - Flame pipe of the burner test stand with built-in glass segment Picture - Flame pipe of the burner test stand with built-in glass segment
Flame pipe of the burner test stand with built-in glass segment
Picture - Top view of the flame during operation with probe for determining the air number Picture - Top view of the flame during operation with probe for determining the air number Picture - Top view of the flame during operation with probe for determining the air number
Top view of the flame during operation with probe for determining the air number

Measurement Techniques

  • PIV
  • BOS

Specifications

Maximum thermal power 450 kW
Air mass flow 0,06 - 0,25 kg/s
Maximum pressure increase 1 bar (ü)
Air ratio 1,5 - 2,5
Variable swirl0° - 45°