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The Volvo burner features the canonical configuration of a bluff-bodystabilized premixed flame. This configuration was studied experimentally underthe Volvo Flygmotor AB program. Two cases are considered in this study: anon-reacting case with an inlet flow speed of 16.6 m/s and a reacting case withequilibrium ratio of 0.65 and inflow speed of 17.3 m/s. The characteristicvortex shedding in the wake behind the bluff body is present in thenon-reacting case, while two oscillation modes are intermittently present inthe reacting case. A series of large-eddy simulations are performed on thisconfiguration using two solvers, one using a high-resolution finite-volume (FV)scheme and the other featuring a high-order discontinuous-Galerkin (DG)discretization. The FV calculations are conducted on hexahedral meshes withthree different resolution (4mm, 2mm, and 1mm). The DG calculations areperformed using two different polynomial orders on the same tetrahedral mesh.For the non-reacting cases, good agreement with respect to the experimentaldata is achieved by both solvers at high numerical resolution. The reactingcases are calculated using a two-step global mechanism in combination with thethickened-flame model. Reasonable agreement with experiments is obtained byboth solvers at higher resolution. Models for combustion-turbulence interactionare necessary for the reacting case as it contains the length scale of theflame, which is smaller than the grid resolution in all calculations. Theimpact of such models on the flame stability and flow/flame dynamics is thesubject of future research.

MVP-Workshop Contribution: Modeling of Volvo Bluff Flame Experiment and Comparison of Finite-Volume and Discontinuous-Galerkin Schemes