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Optical-High Pressure-Atomizer (OHA)

Fuel placement has a major impact on the combustion process and hence on the pollutant building mechanisms. The Optical-High Pressure-Atomizer (OHA) is designed for the investigation of atomisation, vaporisation and mixing of kerosene under realistic operation conditions it the absence of combustion. The test facility with its test rig OSSI (Optical-Swirling-Spray-Injector) allows the integration of realistic aeronautical burner designs. Multiple high pressure windows enable the application of laser-optical measurement techniques. Therefore the test facility offers unique insights into the atomization processes in gas turbine combustors. The experimental data from this test rig is used by several European aeronautical gas turbine manufacturers to optimize their design practice. Moreover, the published database is used by research teams worldwide to validate their CFD based modelling approaches.  
 

GENERAL INFORMATION

• Site: Cologne-Porz, Institute of propulsion technology
• In service since: 1993, Modernisation: 2014
   

TECHNICAL DATA

• Static pressure 25 bar
• Air preheat temperature 850 K
• Air mass flow 1,5 kg/s
• Fuel mass flow 10 g/s
• Catalytic after burner
• Optische Messtechniken:
  • Particle-Image-Velocimetry (PIV)
  • Laser-Doppler-Anemometry (LDA)
  • Phase-Doppler-Anemometry (PDA)
  • Kerosene-LIF
  • Mie-Scattering
  • Tomographic Shadowgraphy
     

FIELD OF APPLICATION

• Optical investigation of fuel vaporisation in gas turbine combustors, i.e. aero engines.
• Unique test rig for isothermal investigation of sprays under realistic operating conditions (real pressure, real temperature, real fuels) of gas turbine injectors
  • Flow field
  • Droplet size distributions & droplet velocities
  • Spray placement
  • Transient droplet velocities
  • 3D- Spray trajectory
  • Placement of gaseous fuel
• Provides experimental  boundary conditions for the two phase  flow of fuel sprays for combustion simulations
• Testing and investigation of SLM-burner and SLM combustor parts