Turbulent hydrogen combustion presently plays an important role in
transportation and power applications like rocket engines and that will remain
so in the near future. In order to gain full understanding of all processes
involved, it is important to investigate simple configurations, like turbulent
temporally developing and reacting shear layers.
The figure shows the density
distribution of such a three-dimensional simulation with infinitely fast chemistry.
The simulation is a so-called Direct Numerical Simulation (DNS) which
resolves all spatial and temporal scales down to the smallest ones.
Therefore, the results of such a computation are of great value for many
detailed statistical investigations and the development of improved
subgrid-scale models for computationally less expensive Large Eddy
Simulations (LES) as well as statistical turbulence models.
Instantaneous density field in [kg/m3].
Direct Numerical Simulation with infinitely fast
chemistry, vertical cut through the domain. The upper stream,
left to right, carries 23% oxygen, the lower stream has the opposite direction
and carries 6.75% hydrogen.
(I. Mahle, R. Friedrich,
Technical University Munich)