Influence of Mesh Quality in Inlet Volute Region on Simulation Results of Flow Field of Horizontal Turbo Air Classifier
In order to investigate the impact of the mesh quality in the inlet volute region on the simulation results of the flow field in the hor-izontal turbo air classifier,the selection principles of four key mesh quality evaluation criteria were summarized based on ICEM CFD pre-processing software,and the mesh model quality of the horizontal turbo air classifier was quantitatively evaluated.The numerical simulation method was used to compare and analyze the simulation results of the flow field in the classifier under three different mesh quality models.The results show that the overall mesh quality is effectively improved when Orthogonal Quality and Skew indexes are used to optimize the model of horizontal turbo air classifier.After optimization,the Q.avg value of Grid-3 was 0.98,which was 36.1% higher than that of Grid-1 and Grid-2,respectively.The mesh quality in the inlet volute area of horizontal turbo air classifier has a significant influence on the stabil-ity,convergence,efficiency and accuracy of its simulation calculation.Grid-1 fluctuates greatly with iteration residuals,and the calculation is terminated without convergence.Grid-2 can reflect the flow field characteristics and particle motion characteristics in the classifier,but the calculation accuracy and efficiency are poor.Grid-3 avoids the above problems,shows good stability and convergence,and more accu-rately reflects the flow field characteristics and particle motion characteristics in the classifier.Compared with Grid-2,the calculation effi-ciency is increased by13.82%,the relative pressure drop error is reduced by 13.53%,and the error of cut size is reduced by 23.7% .The results of discrete phase simulation are more consistent with the results of fly ash classification test.
horizontal turbo air classifierCFD simulationmesh qualityevaluation criteriaICEM CFD
万方数据
维普
