A CFD model of a turbulent supersonic sootblower jet has been developed, that yields accurate predictions not only of the flow associated with "fully-expanded" jets (that result when the lance pressure upstream of the sootblower nozzle matches the design pressure of the nozzle), but also the much more complicated flow physics of "off-design" jets that are characterized by multi-cell shock structures that decay with distance from the nozzle exit due to turbulent mixing. This paper includes a brief overview of the development of the turbulence model that is key to the improved predictions of off-design jets, and then presents predictions of flow phenomena corresponding to experimental data obtained both in the lab and via experiments conducted in an actual recovery boiler, as evidence that the model is well suited for use in the further analysis and development of sootblower technology.
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