Comprehensive chemical kinetic modeling of turbulent methane/air piloted jet flames

It is shown that the Re number dependency of the mechanical-to-scalar-timescale ratio C{sub {phi}} is potentially important for Sandia flames D, E, and F, and that different constant values are preferred. It is also shown that a nonconstant model has some advantages over a constant timescale ratio. However, the model used is not sufficiently sensitive to changes in flow field conditions and thus not sufficiently general.