Numerical Simulation And Engineering Application Of Medium Plate Blowing And Sweeping Flow Based On Fluent

With the transformation and upgrading of the steel industry,how to improve product quality and ensure the core competitiveness of products have become the primary research goals of major steel companies at home and abroad.Due to the high temperature conditions and the contact with air,the iron oxide skin must exist in the production process and has long been the primary factor affecting the quality of hot-rolled products.Although high-pressure water descaling can effectively control the scale of iron oxide in the rolling process,due to the limitations of various factors in actual production,some oxidation residues remain on the surface of the steel plate after descaling,and these residues are easily changed during the rolling process.The surface of the steel plate forms pits,pits and other defects,which greatly reduces the performance and quality of the product.In order to solve this problem,this paper proposes to increase the purge system before and after the rough and finish rolling mills,remove the residual iron oxide scale after high-pressure water descaling through medium-pressure water purge jets,improve the product quality,and combine the actual needs of production.Taking the jet part of the purge system as the research object,based on the principle of computational fluid dynamics,the FLUENT software was used to simulate the purge flow field,and the effect of the nozzle structure and process parameters on the purge performance was studied,thus the production of the purge system.The engineering application in China provides a theoretical basis.At present,the purge system has been put into practical use and has achieved good results.The main research work of this article is as follows:(1)GAMBIT software is used to perform geometric modeling and meshing of the jet field in the process of purging and slag removal and import it into FLUENT software.According to the actual situation,the FLUENT solver,calculation model and numerical algorithm are selected,and the fluid is based on the fluid.The basic mechanical equations of mechanics calculate the boundary conditions and perform numerical simulations on the purge flow field.(2)According to the simulation results of FLUENT software under different parameters and combining the velocity curve and dynamic pressure curve diagram of the core area and wall area of ??the jet,the impact of nozzle structure and process parameters on the performance of the purge jet is analyzed,and a purge jet isestablished.The mathematical model between speed and injection flow pressure provides a theoretical basis for the selection of parameters in practical applications.(3)Analyze and compare the similarities and differences between the SIMP and PISO algorithms in the FLUENT software,compare and verify the simulation results of the two algorithms under the same conditions,and verify the accuracy of the simulation results based on the coincidence of the two simulation results.(4)Explain the basic structure of the purge system and analyze the effect of the purge system in practical application.The current purge system has been successfully applied to a mid-plate mill production line,and has achieved good economic returns while improving product quality.