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Tangentially-fired furnaces (TFF) are one of the modified types of furnaces   which have become more attractive in the field of industrial firing systems   in recent years. Multi-zone thermodynamic models can be used to study the   effect of different parameters on the operation of TFF readily and   economically. Flow and mixing sub-model is a necessity in multi-zone models.   In the present work, the semi-analytical model previously established by the   authors for the prediction of the behavior of coaxial turbulent gaseous jets   is extended to be used in a single-chamber TFF with square horizontal   cross-sections and to form the flow and mixing sub-model of the future   multi-zone model for the simulation of this TFF. A computer program is   developed to implement the new extended model. Computational fluid dynamics   (CFD) simulations are carried out to validate the results of the new model.   In order to verify the CFD solution procedure, a turbulent round jet injected   into cross flow is simulated. The calculated jet trajectory and velocity   profile are compared with other experimental and numerical data and good   agreement is observed. Results show that the present model can provide very   fast and reasonable predictions of the flow and concentration fields in the   TFF of interest

Extended semi-analytical model for the prediction of flow and concentration fields in a tangentially-fired furnace