The future use of hydrogen as a clean fuel and an energy carrier brings in safety issues that
have to be addressed before community acceptance can be achieved. In this regard,
availability of accurate modeling techniques is very useful. This paper presents large eddy
simulations (LES) of propagating turbulent premixed flames of hydrogen-air mixtures in a
laboratory scale combustion chamber. A Dynamic flame surface density (DFSD) model
where the reaction rate is coupled with the fractal analysis of the flame front structure, is
implemented and tested. The fractal dimension is evaluated dynamically based on the
instantaneous flow field. The main focus of the current work is to establish the LES technique
as a good numerical tool to calculate turbulent premixed hydrogen flames having an
equivalence ratio of 0.7. Developing this capability has practical importance in analyzing
explosion hazards, internal combustion engines and gas turbine combustors. The results
obtained with the DFSD model are compare well with published experimental data. Further
investigations are planned to examine and validate the LES-DFSD model for different flow
geometries with hydrogen combustion