Dipl.-Ing. Thomas Krenn
Working area(s)
Contact
krenn@rsm.tu-...
work +49 6151 16-28917
fax +49 6151 16-28900
Work
L6|01 115
Otto-Berndt-Str. 3
64287
Darmstadt
Within the framework of the collaborative project Clean Circles, a novel energy-material cycle is intended to play a central role in future adjustments to energy supply. In this process, iron powder is oxidized at high temperatures, releasing chemical energy that is harnessed in power plants, and the oxidized iron is collected. Through renewable sources, the iron oxide is then reduced, completing the energy-material cycle. As there is currently insufficient knowledge about the combustion process of iron dust in air, gaining detailed insights into the coupling of reaction and transport processes and the influence of self-ignition is crucial. These phenomena significantly contribute to flame propagation and are of great relevance to other subprojects within the Clean Circles cluster project. Key research questions include:
- How does the laminar premixed iron dust flame vary with equivalence ratio, particle size distribution, flow velocity, etc.?
- How is a premixed laminar flame stabilized through the coupling of reaction and transport processes?
Currently, a laminar jet burner surrounded by a coflow is employed to investigate laminar iron dust flames. The iron particle suspension is created using an Air-Knife Seeder. This setup allows for the examination of both Bunsen flames and lifted flames, with the ability to vary parameters such as particle size distribution, oxidizer oxygen content, and particle loading. In analyzing these flames, methods include high-speed recordings of scattered light from particles moving through a laser sheet. This enables the reconstruction of flame position and particle flow field through Particle Image Velocimetry (PIV). Consequently, relevant thermochemical parameters, such as the laminar burning velocity, can be derived.
