PREDICTION OF TURBULENT FLOW CHARACTERISTICS IN THE CURVED DUCT WITH A BAFFLE-中国期刊网

摘要 Thechangesofthedevelopingturbulentflowcharacteristicsincurvedductafteraddingabafflearestudiednumericallyatthebody-fittedcoordinates.ak-εmodelisusedtorepresenttheturbulence.acurvedductofrectangularcross-sectioniscomputedfirstly,ithasbeenobservedthatthepredictionsusingtheprocedureagreeverysatisfactorywiththeexperimentaldata.Then,twokindsofsquareductsarestudied,oneisnormalcurvedduct,theotherisaductwithabaffle.Thecomputationalresultsarepresentedandcomparedtoeachother,inordertodisplaythechangesoftheflowafteraddingabaffleincurvedducts.Thesecondaryflowinaductwithabaffleischaracterizedbyfour-vorticesstructurewiththeoutertwobiggerthantheinnertwo.Besides,comparedwiththeductwithoutabaffle,theintensityofthesecondaryflowsisreduced,whichresultsintheflowfieldofthecross-sectionmuchmoreequableandhasmuchmoresignificantmeaningintheengineering.

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PREDICTION OF TURBULENT FLOW CHARACTERISTICS IN THE CURVED DUCT WITH A BAFFLE

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PREDICTION OF TURBULENT FLOW CHARACTERISTICS IN THE CURVED DUCT WITH A BAFFLE

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