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Institut für Strömungslehre und Wärmeübertragung
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Experimental Validation & Data Analysis

Since the foundation of our department we have a strong dedication to validate all new numerical models with in house lab experiments.

As it is not easy to extract quantitative data from multiphase flow experiments, the validation of numerical models needs some creativity and quite often one has to leave the established methods and find some new approaches on qualitative or pseudo quantitative data processing methods. Thus, we developed a strong focus on image and signal processing of experimental data, and over the last years we also managed to transfer some of these methods to real plant data. Some examples can be found below and in our annual reports.

Fluid mechanics laboratory


DI Dr. Stefan Puttinger


Science Park 1, Ground Floor

Particle Image Velocimetry

Particle image velocimetry (PIV) is a powerful tool to extract planar velocity vector fields with two or three components (via stereo PIV).
Free jet illuminated by laser Free jet illuminated by laser

Blast Furnace Raceway Blockage Detection

The raceway areas in a blast furnace are highly dynamic structures and are subject to collapsing from time to time because of the downward movement of the burden. These events can result in reduced gas throughput and incomplete burning of fuel substitutes like pulverized coal. Due to the harsh environment in a blast furnace there is only very few plant data available about the process.

Image from a tuyere camera

This study aims to find an optimal blockage detection based on the combination of hot blast flow rates and additional tuyere cameras. A usual implementation of triggering the shutdown of PCI lances is to use a threshold value for a minimum wind flow rate through the individual tuyere sections. However, a blast furnace never shows exact axially symmetric behavior, thus the hot blast flow rates vary between the tuyeres. So applying the same threshold level to all tuyeres is not an optimal solution to trigger the shutdown of PCI lances. Within this K1Met project we test various approaches for signal and image processing of available blast furnace data to optimize raceway blockage detection.

Powder Injection

Highly laden particle jets occur in many industrial applications like burners for solid fuels.

Our laboratory test facility allows to investigate highly laden powder injection in a crossflow wind tunnel via high-speed camera and particle image velocimetry (PIV).

Powder injection in a wind tunnel Dispersion of a particle jet in wind tunnel cross-flow.

Mixing of Gases

Mixing of two gases is essential in many combustion processes and engine systems.
Mixing of a pulsed jet in a crossflow channel Mixing of a pulsed jet in a crossflow channel

Highspeed Camera

Particle Image Velocimetry

Free jet illuminated by laser

Hot Wire Anemometry