Bildergalerie

Gallery

  • Evaporation and condensation in capillary structures
  • Evaporation and condensation in capillary structures
  • Evaporation and condensation in capillary structures
  • Camera Unit and Pretests for a Liquid Meniscus in a Single Capillary Slot 58th ESA Parabolic Flight Campaign May/June 2013)
  • The TTD boiling Team on board the Airbus A 300 Zero-G during the 100th parabolic flight campaign of ESA, DLR and CNES.
  • High Resolution Heat Transfer Measurements for Forced Convective Boiling in Minichannels – Parabolic Flight Setup for experiments in zero gravity (58th ESA Parabolic Flight Campaign May/June 2013)
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  • Experimental facility for the investigation of boiling phenomena. The test facility provides the possibility an investigation of single bubbles, bubble coalescence, and structures surfaces. As heater a 20mm thick stainless steel foil is used. Therefore the local heatflux distribution can be observed by high speed infrared thermometry.
  • Pool boiling on a partial structured surface at low pressures. The refrigerant FC-72 is used as working fluid.
  • Numerical observation of the behaviour of Leidenfrost drops on structured surfaces.
  • The probe was developed by Prof. Dr.-Ing. H. Auracher, Prof. Dr.-Ing. Felix Ziegler und Dipl.-Ing. Olaf Koeppen at the Institut für Energietechnik at TU Berlin and has been technically revised and developed further by the Institute for Technical Thermodynamics.
  • Thermometry of an evaporating droplet using a micro thermocouple probe. Its diameter at the tip is only around 13µm with a coaxial pair of conductors.
  • Test setup for investigations on short-scale Marangoni convection, driven by thermocapillary forces, in thin liquid films on heated structured surfaces. Investigated are the structures impact on the flow field, film thickness and temperature distribution
  • A close up of the open test cell
  • Test setup for investigations on long-scale Marangoni instabilities, driven by thermocapillary forces, in heated thin liquid films on structured surfaces. Investigated are the structures impact on the film deformation and film rupture
  • The data acquisition and setup control rig.
  • left: CAD-Model of an airblast-atomizer fuel injection system (LPP-Technology) right: Formation of liquid film through accumulation of fuel droplets; evaporation of liquid film and wave generation by hot turbulent gas stream; droplet entrainment through strong shear force at the liquid-gas interface
  • Flow channel for experimental investigation of gas-driven liquid films flowing at vertically aligned heated evaporator tubes
  • Top left: Evaporator tube with micro-pyramid-structure Top right: Microscopic image of a single pyramid for the characterization of the surface topography Below from left to right: Infrared records of the wetting dynamics of gas-driven liquid film flowing down the surface of a heated evaporator tube incorporating micro-pyramid-structure
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  • Spray on a smooth surface
  • Micrograph of a copper powder sintered porous surface
  • Micrograph of a DMLS sintered steel structure
  • Droplet shape and temperature field during single drop impingement onto a superheated wall
  • Comparison of droplet shape and wall heat flux obtained from simulation and experiment during single drop impingement
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  • Nummerical simulation of a water heat accumulator
  • Convective heat transfer on a dimple surface
  • Convective heat transfer on a dimple surface
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  • Laserlab
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  • Secretariat