With green light simulated laser light sheet Particle Image Velocimetry in the occupied Do728-cabin with thermal dummies.

In the Department Fluid Systems fundamental and applied research projects are conducted to solve fundamental and applied flow problems using experimental and numerical methods. The investigated topics include the air and water supply-systems in airplanes and trains, cooling and injection systems in engines of automobiles, the aerodynamics in airplane cabins, passenger compartments of vehicles and of trains. To solve these flow problems sophisticated measurement techniques, highly accurate and validated numerical methods and reliable physical models are needed. To solve industrial problems regarding train aerodynamics, internal flows, ventilation and spray distribution commercial and in-house DLR methods of „Computational Fluid Dynamics (CFD)” are available. For investigations of turbulent flows in generic and complex geometries with more fundamental objectives numerical methods suitable for Direct Numerical Simulations (DNS) and Large-Eddy Simulations (LES), are used. Additionally, conventional and optical measurement techniques are developed to validate the computed results by determining unsteady and three-dimensional temperature and velocity fields. The application of these sophisticated measurement techniques in several test facilities and in flight tests for the recording of large scale, time-dependent and three-dimensional velocity and temperature fields is another focus of the department’s efforts.

The department's fields of activity:

• Computational Fluid Dynamics
  • Cabin aerodynamics 
  • Flows in aircrafts air supply systems 
  • Vehicle aerodynamics 
  • Rotating flows
  • Flow in injection systems
• Experimental Vehicle Aerodynamics
  • Site wind stability of high-speed trains
  • Ballast projection and underfloor flows 
  • Tunnel aerodynamics of high-speed trains
  • Truck aerodynamics
• Experimental Internal Aerodynamics 
  • Flight measurement techniques 
  • Room and cabin ventilation 
  • Large Scale Particle Image Velocimetry
  • Mixed convection under high pressure

Simulation Center of Aerodynamic Research in Transportation (SCART)