Methane swirl-stabilized lean burn flames: assessment of scale-resolving simulations
نویسندگان
چکیده
منابع مشابه
Combustion dynamics of swirl-stabilized lean premixed flames in an acoustically-driven environment
Combustion instability is a process which involves unsteady chemical kinetic, fluid mechanic, and acoustic processes. It can lead to unstable behavior and be detrimental in ways ranging from faster part fatigue to catastrophic system failure. In terms of combustion methodology, combustion instability has been a key issue for lean premixed combustion. The primary objective of this work is to imp...
متن کاملEffect of swirl on combustion dynamics in a lean-premixed swirl-stabilized combustor
The effect of inlet swirl on the flow development and combustion dynamics in a lean-premixed swirl-stabilized combustor has been numerically investigated using a large-eddy-simulation (LES) technique along with a level-set flamelet library approach. Results indicate that when the inlet swirl number exceeds a critical value, a vortex-breakdown-induced central toroidal recirculation zone is estab...
متن کاملThermal Radiation Properties of Turbulent Lean Premixed Methane Air Flames
Thermal radiation properties of turbulent premixed flames have received little attention in the past perhaps because of the lower radiative heat loss compared with that for non-premixed flames. However, the high-temperature sensitivity of NO kinetics and the importance of radiation in near-limit laminar premixed flames provide fundamental reasons for studies of radiation properties of turbulent...
متن کاملExperiments and Simulations of Lean Methane Combustion
Computational fluid dynamics simulation of methane combustion using chemical kinetics is studied. Linear least squares data fit to measured concentrations and temperatures is used to modify reaction rate parameters in the Arrhenius rate equation for combustion of methane. The modification of reaction rate parameters influences the result of CFD-simulations to predict combustion at experimental ...
متن کاملLarge-Eddy Simulation of Combustion Dynamics of Lean-Premixed Swirl-Stabilized Combustor
Nomenclature CR,CI = empirical constants C = speed of sound, m/s D = Van-Driest damping function E = specific total energy f = frequency, Hz G = level-set variable hf,i = heat of formation of species i at reference condition k = turbulent kinetic energy lF = laminar flame thickness, m l = inner-layer flame thickness, m n = unit vector normal to flame front p = pressure Pr = Prandtl number q = r...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Energy Procedia
سال: 2017
ISSN: 1876-6102
DOI: 10.1016/j.egypro.2017.08.274