Multiple optical measurement techniques have been applied for the investigation of a propeller-wing wind tunnel model. The (half) wind tunnel model is equipped with a nine bladed propeller and its wing has active Coanda blowing over the whole span of the wing.
Particle Image Velocimetry not only allows visualizing the airflow around the bike and rider, but also accurately measures the flow in detail. Development engineers use these results to optimize the performance of bike and clothing and help André Greipel in this way to reach new sportive achievements.
COMTESSA stands for Camera Observation and Modelling of 4D Tracer Dispersion in the Atmosphere. COMTESSA’s vision is to elevate the theory and simulation of turbulent tracer dispersion in the atmosphere to a new level by performing completely novel high-resolution 4D measurements.
Large-volume volumetric flow experiments and their results: The first of these, investigating a thermal plume at low velocities (up to 0.35 m/s) demonstrates the abilities and requirements to reach volume sizes up to and probably beyond one cubic meter.
A novel approach to the evaluation of time resolved particle-based tomographic data is introduced. By seizing the time information contained in such datasets, a very fast and accurate tracking of nearly all particles within the measurement domain is achieved at seeding densities comparable to (and probably above) the thresholds for tomographic PIV.
A flow-through nacelle investigated at the Institute of Fluid Mechanics and Aerodynamics of the Universität der Bundeswehr in Munich.