基于SST與撞擊流的軟性磨粒流動(dòng)力學(xué)特性及實(shí)驗(yàn)研究.pdf

1、浙江工業(yè)大學(xué)碩士學(xué)位論文基于SST與撞擊流的軟性磨料不育動(dòng)力學(xué)特性及實(shí)驗(yàn)研究姓名：付有志申請學(xué)位級別：碩士專業(yè)：機(jī)械電子工程指導(dǎo)教師：計(jì)時(shí)鳴；譚大鵬201112浙江工業(yè)大學(xué)碩士學(xué)位論文DYNAMICSANALYSISANDEXPERIMENTALSTUDYoFSoFTABRASIVEFLoWMACHDiINGBASEDoNSSTTURBULENCEMODELANDIMPINGINGJETABSTRACTSoftAbrasiveFlowM

2、achining(SAFMliSanewmethodusingabrasiveflowwhichiSinturbulencestatetoprocesspartsThemotionlawofabrasiveflowindifferentconstrainedflowpassagesandprocessingdeviceswasanalyzedbasedonthesimulationresultsThenanimprovedflowpas

3、sageordevicewasdesignedbasedontheanalysisresuRs，andtheoptimizationprocessingWasrealizedinS刪Inthisthesis，themainworkaccomplishedincludesthefollowing(1)Accordingtothefactthattheprocessingeffectofthesingleinletprocessingdev

4、iceWasnotuniformandbasedontheimpingingjettheoryanewmethodofturbulencestrengtheningusingdoubleinletsWasproposed(2)BasedontheSSTktoturbulencemodelcombiningMixturemodelallanalysismodelfortheprocessingofSAFMWasestablishedThe

5、dynamicscharacteristicofabrasiveflowintwokindsofprocessingdevicewasanalyzedusingnumericalsimulationmethodTheresultsshowthatinsingleinletprocessingdevice，thereisalowvalueregioninthecenterofconstrainedflowpassagesbecauseof

6、sectionbreakandrestrictionofwallonitandthereiSanattenuationtrendofturbulencekineticenergyalongflowdirectionInthewholemachiningprocess，theprocessingeffectisnotuniformonthemachinedsurfaceifthedistributionoftheabrasiveflowi

7、nconstrainedflowpassagesisstableDuetothecollisionoftwoflowsthedistributionofallparameterschangedwithtimeindoubleinletsprocessingdevice，andthefLxedattenuationtrendofturbulencekineticenergyinspecificdirectionwasbrokenInawo

8、rdthedoubleinletsprocessingdevicestrengthentherandombehaveoftheabrasiveflowinconstrainedflowpassages，andauniformprocessingeffectisconductedwithit(3)Machiningexperimentsshowthatthesurfaceroughnessonbothsideswaslargerthant

9、hatofthecenteralongtheflowdirectionwhichprocessedbythesingleinletprocessingdevice，andtheoriginalmachiningmarkswasremovedincompletelyonbothsidesOnthecontrarytheprocessingeffectofbothsidesisconsistentwiththecenterofthesurf