Prediction of turbulent non-premixed hydrogen flames using second-order conditional moment closure modelling

Conditional Moment Closure Modelling of Turbulent Spray Flames

Simulation of premixed turbulent flames

1. Introduction Premixed turbulent flames are of increasing practical importance and remain a significant research challenge in the combustion community. These flames have the potential to operate cleanly and efficiently over a broad range of fuels, and therefore to represent a key element in the implementation of low-emissions burners for a variety of industrial applications. However, it is di...

Prediction of combustion-generated noise in non-premixed turbulent flames using large-eddy simulation

Noise generated from technical devices is an increasingly important problem. Jet engines in particular produce sound levels that are not only a nuisance, but may also impair hearing. The noise emitted by such engines is generated by different sources, such as jet exhaust, fans or turbines, and combustion. Increasing restrictions on the allowable noise-emission levels force manufacturers to desi...

Modeling of Moderately Swirling Turbulent Non-premixed Flames

Even if the goal of reducing NOx emissions pushes towards the use of premixed combustion, moderately swirling turbulent non-premixed flames are still widely employed in both industrial furnaces and gas turbines, because of their stable and safe behaviour in a wide range of fuels and operating conditions. Computational Fluid Dynamics (CFD) has become in recent years a key tool for the design of ...

Three-scalar Imaging in Turbulent Non-premixed Flames of Methane

Raman scattering from nitrogen in laminar (Re 4 1600) and turbulent (Re 4 15,000) non-premixed flames of diluted methane has been investigated as a means of complementing the two-scalar mixturefraction computation based on measurements of fuel mass fraction and temperature (nFT). Using a diluent consisting of argon and oxygen with an overall volumetric dilution ratio of 3/1 (diluent/fuel) allow...