Simulation to Analyze Two Models of Agitation System in Quench Process

摘要

In this work, two models of agitation for an industrial quench system carried out in arnrectangular in shape tank were simulated. To analyze the system behavior it wasrnconsidered a submerged agitation system in bottom of the tank and the other adding arnlateral arrangement in an attempt to standardize the agitation in the quench zone. In thisrnsimulation process the cooling profile and heat transfer coefficient were evaluatedrnthrough a calculation procedure implemented in the ANSYS CFX~? software and theyrnwere analyzed to understand how far from the uniformity the cooling is. The resultsrnshown that the cooling of material was not uniform for the case one (agitation in thernbottom of the tank) , because the temperature profile of one side was very different fromrnthe others, showing that in this case it is possible to occur different formation ofrnmicrostructures in the same material. For the case were a lateral arrangement is used arnbetter uniformity was achieved. The cooling uniformity is necessary to avoid thernformation of different microstructures such as foreseen in case one. The analysisrnprovides information of how CFD can improve control of quench process by studies ofrnoptimal quench uniformity.