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High-Pressure-Cooling-Rig (HPCR)



The High-Pressure-Cooling-Rig was developed to investigate the cooling effectiveness of metallic and ceramic combustor wall elements. The test section fits into the HBK 3 test rig and allows the characterisation of test objects with original size and under realistic combustor conditions. A combustion chamber is used to produce hot gas at elevated pressures with the typical swirl, turbulence and velocity profile of real combustion chambers. The hot gas is guided into the test section where the test object, e.g. combustor wall element, is placed. The test object is cooled with pre-heated air to create a realistic cooling profile. Thermocouples and heat flux sensors are used to monitor the temperature and cooling effectiveness of the wall element. To determine a two dimensional temperature distribution of the test object, an infra-red camera can be installed. Optical access to four sides is granted through high pressure windows in the test section.  At different test conditions the influence on the temperature distribution of the wall element is measured and the cooling effectiveness is determined.
Especially lean burn combustors tend to develop thermoacoustic oscillations. The resulting pressure fluctuations impede the cooling effectiveness and reduce the lifetime of combustor parts. To analyse this influence the test rig can also be operated with self-excited pressure oscillations. An additional pressure casing can house tubular combustor cans. In this configuration the test rig is used to investigate prototype combustors made from ceramic matrix composites.
 

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GENERAL INFORMATION

  • Site: Cologne-Porz, Institute of Propulsion Technology, HBK 3
  • In service since: 2004
  • Mission: Characterisation of cooling effectiveness of metallic and ceramic combustor wall elements at realistic operating conditions
     

TECHNICAL DATA

  • Static pressure 5..20 bar
  • Hot gas temperature 1500..1800 K
  • Hot gas velocity 20..40 m/s
  • Cooling air temperature of test object 300..700K
  • Dimensions of test object 80 x 100 mm²
  • Optical access to hot gas channel from 4 sides
  • Three-axis traverse for measurement technique
  • Measurement techniques:
    • 2D Laser-Doppler-Anemometry
    • High speed infrared camera
    • Unsteady heat flux sensors
    • Transient pressure transducer
       

Field of Application

  • Characterisation of cooling effectiveness of metallic and ceramic combustor wall elements at realistic operating conditions
     

COOPERATIONS

  • Rolls-Royce Deutschland Ltd & Co KG

Contact
Dr.-Ing. Thomas Behrendt
German Aerospace Center

Institute of Propulsion Technology
, Combustor
Köln

Tel.: +49 2203 601-2008

Related Topics
Lasers and Masers
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