A Tractable Solution for Engineering Calculations on Buoyancy Dominated Turbulent Non-Premixed Flames
نویسندگان
چکیده
منابع مشابه
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...
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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 ...
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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...
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In order to evaluate transport properties in turbulent premixed flames, a propagating turbulent premixed flame in an incoming homogeneous isotropic turbulence is directly simulated assuming a single-step irreversible Arrhenius-type reaction. To investigate the production of turbulent kinetic energy in the flame region, Favre averaged transport equation of turbulent kinetic energy along streamwi...
متن کاملCharacteristics of a Subgrid Model for Turbulent Premixed Flames*
A modified version of the linear eddy model (LEM) for subgrid combustion is developed and used for studying the properties of turbulent premixed flames in the core region of Couette flow. The handling of the burning (diffusion/reaction) and specie transport, in this new approach, is fully deterministic. The model is, therefore, found to predict the correct laminar flame speed in the limit of ze...
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ژورنال
عنوان ژورنال: Fire Science and Technology
سال: 2015
ISSN: 0285-9521,1882-0492
DOI: 10.3210/fst.34.1