Numerical Prediction of the Flow Structure Inside Components of Industrial Glass Furnace Systems

Cravero, Carlo; Domenico, Davide De; Kenfack, Franc D.; Leutcha, Philippe

doi:10.37394/232013.2020.15.11

Cited by 1 publication

(2 citation statements)

References 16 publications

(23 reference statements)

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“…Fluent software was used for the simulations with the RANS approach and steady flow. The turbulence model chosen for closure is the k-epsilon realizable: it has been selected for these type of problems (presence of separations and recirculations) from previous analysis [11]. To take into account the different characteristics of gas and air the compositions of the fluids is considered and the multispecies fluid model is activated with transport equations for the different chemical species.…”

Section: Figure 1 Typical Configuration Of a Regenerative Glass Furnacementioning

confidence: 99%

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A CFD Based Approach for the Simulation of Gas Recirculation Systems in Regenerative Chambers for Glass Production Plants Consistent with Functional Details Found in Real Geometries

Cravero¹,

Domenico²,

Leutcha³

2020

TI-IJES

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The use of CFD has proven to be a very effective tool for the design of regenerative systems in glass production plants. Different CFD approaches have been set up by the authors to simulate the regenerative chambers to include heat transfer and pressure losses effects from the internal refractory structure. The above models have been used to conceive a gas recirculation strategy for the NOx containment from natural gas combustion and are currently used in industry to design such systems. On the other hand, it can be observed that the actual geometry found in a new regenerative chamber or after years of continuous operation is different from the CAD geometry used in the design process. In fact, the CAD geometry has sharp edges at the junction of solid surfaces while the actual geometry of a refractory block is with blunt edges and the above edges are rounded off by corrosion and erosion processes during operation. The effects of the above geometrical details on the flow structure inside the furnace components have been highlighted in a previous paper. The dramatic change that can occur in the flow topology with the introduction of those geometrical details can jeopardize the use of the standard CFD approaches for design purposes. In the present paper the attention is focused on the regenerative chamber with the gas recirculation systems. This NOx containment strategy is effective if the recirculated gases, in the regenerative chamber with combustion air, are correctly distributed above the flame structure in order to reduce the maximum temperature that will cause NOx formation. The effects of the geometrical details on the edges in the regenerative chamber are investigated in order to develop a more effective and consistent design approach based on CFD and to setup a proper simulation tool to predict the effects of erosion (rounded edges) on the gas recirculation strategy. The simulation approach is applied to actual regenerative chambers equipped with the gas recirculation strategy to understand the above effects on an existing glass production plant.

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Section: Figure 1 Typical Configuration Of a Regenerative Glass Furnacementioning

confidence: 99%

“…Moreover, the effect of erosion due to continuous operation modifies the geometry and the internal flow structures. As discussed in [11], the furnace has some geometric features that are not taken into account in the 3D basic design drawings. This is true for internal edges: in the original CAD they are all sharp edges.…”

Section: Introductionmentioning

confidence: 99%