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Numerical simulations of buoyant reactive jets with sidewall effects. (English) Zbl 1137.76397

Summary: The near field dynamics of buoyant reactive jets with adjacent sidewalls is investigated by time-dependent three-dimensional direct simulations. The physical problem is a fuel jet issuing vertically into an oxidant ambient environment in a corner configuration with sidewall boundaries. Simulation results are presented for two cases with different jet nozzle geometries: a corner-round reactive jet and a corner-square reactive jet with the same cross-sectional area on the nozzle plane. Buoyancy-induced large vortical structures evolve spatially in the flow field and transition to turbulence occurs downstream. Calculation of the mean flow properties shows that entrain ment of the corner-round jet is stronger than that of the corner-square jet due to the stronger vortex deformation in the corner-round case.

MSC:

76F65 Direct numerical and large eddy simulation of turbulence
76V05 Reaction effects in flows
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