The objective of the current work is to shed light on simulating the flow features of nonpremixed flame stabilized by a circular-disk bluff-body with large eddy simulation technique. Two subgrid scale (SGS) models (Smagorinsky and Germano), combined with a constrained chemical equilibrium model, are applied to simulate this turbulent flame. Validation is made through the particle image velocimetry measurements. The comparison between the numerical simulation and experimental data shows that both models perform well and reproduce most of the significant features of the bluff-body flame, while the Germano SGS model performs better in prediction of turbulent fluctuations. These investigations show that it is possible to describe such flows with relatively simple turbulence and combustion models with moderate grids.

Issue Section:
Technical Briefs
Keywords:
combustion, flames, flow instability, flow simulation, flow visualisation, turbulence, velocity measurement, large eddy simulation, bluff-body, nonpremixed combustion
Topics:
Combustion, Disks, Flames, Flow (Dynamics), Large eddy simulation, Turbulence, Computer simulation
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