Abstract
The Micromix combustion principle, based on cross-flow mixing
of air and hydrogen, promises low emission applications in
future gas turbines. The Micromix combustion takes place in several
hundreds of miniaturized diffusion-type micro-flames. The
major advantage is the inherent safety against flash-back and low
NOx-emissions due to a very short residence time of reactants in the
flame region. The paper gives insight into the Micromix design and
scaling procedure for different energy densities and the interaction
of scaling laws and key design drivers in gas turbine integration.
Numerical studies, experimental testing, gas turbine integration and
interface considerations are evaluated. The aerodynamic stabilization
of the miniaturized flamelets and the resulting flow field, flame
structure and NOx formation are analysed experimentally and
numerically. The results show and confirm the successful adaption
of the low NOx Micromix characteristics for a range of different
nozzle sizes, energy densities and thermal power output.
