简介：Airfoilself-noiseisacommonphenomenonformanyengineeringapplications.Aimingtostudytheunderlyingmechanismofairfoilself-noiseatlowMachnumberandmoderateReynoldsnumberflow,anumericalinvestigationispresentedonnoisegenerationbyflowpastNACA0018airfoil.Basedonahigh-orderaccuratenumericalmethod,boththenear-fieldhydrodynamicsandthefar-fieldacousticsarecomputedsimultaneouslybyperformingdirectnumericalsimulation.Themeanflowpropertiesagreewellwiththeexperimentalmeasurements.Thecharacteristicsofaerodynamicnoiseareinvestigatedatvariousanglesofattack.Theobtainedresultsshowthatincliningtheairfoilcouldenlargeturbulentintensityandproducelargerscaleofvortices.Thesoundradiationismainlytowardstheupperandlowerdirectionsoftheairfoilsurface.Athigherangleofattack,thetonalnoisetendstodisappearandthenoisespectrumdisplaysbroad-bandfeatures.

简介：Inthisstudy,afowsolverwasdevelopedbasedonthegoverningRANSequationsofcompressiblefowsandwasfurtherextendedtoincludetheefectsofelectromagneticforcesnamelyLorentzforces.Lorentzforcesmaybeaddedasasourceterminthegoverningfuidfowequations.NumericalstudieswerecarriedoutforNACA0015aerofoilathighanglesofincidencesfrom15to30andcomparedwithsomeavailablecasesofexperimentalandincompressiblenumericalsolutions.Thehydrodynamicsperformancewasimprovedusingamagneticmomentumcoefcientofupto0.048.Thesizeoffowseparationzonewasdecreasedorcompletelyeliminatedbyincreasingthiscoefcient.Theoveralldragwasnotchangedconsiderably,howevertheoverallliftwasincreasedupto80percentatstallangles.

简介：Theeffectsofcarbon-ionirradiationoncancercelltelomerefunctionhavenotbeencomprehensivelystudied[1].Ourpreviousreportshowedthatcancercellswithtelomeredysfunctionweremoresensitivetocarbon-ionirradiation,butthemechanismthatlinktelomeredysfunctionandcancercellinactivationhasnotbeeninvestigated.