Reacting Flows

Turbulent flames

Piloted Turbulent Bunsen Flames

The problem of measuring and computing the turbulent flame speeds and reaction rates of arbitrary flames is still not resolved. We explore the small scale range of turbulent flames via envelope turbulent flames, by measuring their structure and local flame speed. In recent experiments we have explored the use of Opto-Acoustic Deflection (AOD) devices to scan the structure of low turbulence flames and their reconstruction.

quasi-3D scan of a low turbulence methane-air flame

Turbulent Hydrogen-methane flames

We have been investigating the structure of hydrogen-methane flames in collaboration with Isaac Boxx (DLR, currently Aachen). We have developed a faster method for determining the flame edge for flames. Current experiments aim to understand the structure of flames and their burning rate. Numerical DNS work in collaboration with Newcastle University, and funded by EPSRC.

quasi-3D scan of a low turbulence methane-air flame

Results are reported in:

O. Chaib, Y. Zheng, S. Hochgreb, and I. Boxx, “Hybrid algorithm for the detection of turbulent flame fronts”, Exp Fluids (2023) 64: 104