INITIAL VALIDATION OF A MATHEMATICAL-MODEL OF COLD FLOW IN A RECOVERYBOILER

Air flow in a commercial recovery boiler was modeled mathematically fo r two sets of cold-flow conditions. Case 1 was for air flow through th e primary and secondary ports, while Case 2 was restricted to air flow through the secondary parts only. There was no flow through the terti ary ports. The fully turbulent cold flow resulting from the jet intera ction was computed using code developed specifically for modeling furn ace air flow. A steady-state solution was obtained for Case 1, but an unsteady solution was obtained for Case 2. The computed air-flow patte rns resembled real flow fields measured physically under the same set of conditions.