Passive scalar interface in a spatially evolving mixing layer (A. Attili and D. Denker)

Quartz nozzle sampling (D. Felsmann)

Dissipation element analysis of a planar diffusion flame (D. Denker)

Turbulent/non-turbulent interface in a temporally evolving jet (D. Denker)

Dissipation elements crossing a flame front (D. Denker and B. Hentschel)

Particle laden flow (E. Varea)

Turbulent flame surface in non-premixed methane jet flame (D. Denker)

DNS of primary break up (M. Bode)

Diffusion flame in a slot Bunsen burner (S. Kruse)

Various quantities in spatially evolving jet diffusion flame (D. Denker)

Experimental Exploration of Renewable Fuels

The fundamental research in the Cluster of Excellence “The Fuel Science Center – Adaptive Conversion Systems for Renewable Energy and Carbon Sources” (FSC) aims to integrate renewable electricity with the joint utilization of bio-based carbon feedstocks and CO2 to provide high-density liquid energy carriers (“bio-hybrid fuels”), which enable innovative engine concepts for highly efficient and clean combustion.

Exploring future renewable fuel candidates regarding their application potential requires the experimental determination of fundamental combustion properties, such as the laminar flame speed. This flame metric describes the progress of chemical reactions, diffusion, and heat conduction in premixed combustion processes. Therefore, it is an essential parameter to model flame propagation in spark-ignition combustion engines. This qualifies the laminar flame speed not only as a validation target for detailed chemistry models but also as a performance indicator describing the impact of the fuel on engine efficiency.

Laminar flame speeds are determined at the ITV in a closed combustion chamber from optical Schlieren photography of a centrally ignited spherical expanding flame and from pressure data collected during the isentropic compression.