ATMO - Atmospheric Spray Test Rig

Atomization of high viscous liquids and suspensions


The ATMOspheric Spray Test Rig ATMO is used for the experimental investigation of the spray quality of twin fluid nozzles applying optical measuring techniques. Spray quality is detected as a function of fluid properties (viscosity and surface tension), operating conditions of the nozzle (GLR – Gas to Liquid Ratio, gas- / liquid-velocity) and nozzle geometry. The test rig offers the possibility to atomize pure liquids and suspensions featuring viscosities up to 1000 mPas.

The experiments performed at ATMO are focused on fundamental physical phenomena occurring during the atomization process, e.g. estimation of primary instabilities and breakup regime as function of operating conditions. Furthermore drop size distribution is detected as a function of nozzle distance to investigate secondary breakup and agglomeration phenomena in the spray. The experimental data revealed at ATMO are used for the validation of CFD-modelling tools of atomization as well as input data for modelling of combustion and gasification processes.

Technical Data:
Temperature Tliq = 10 – 50 ° C
Pressure atmosphärisch
Massflow flüssig: 1 - 20 kg/h
gas: 1-20 kg/h
Fluid-viscosity (liquid) 1 - 1000 mPas

Measuring technique:

  • Laser Diffraction
  • PDA (Phase Doppler Anemometry)
  • Shadowsizing
  • PIV (Particle Image Velocimetry)
  • High-Speed-Camer

Working group: Liquid Fuel / Atomization