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1、大連理工大學(xué)碩士學(xué)位論文摘要感應(yīng)凝殼熔煉(InductionSkullMelting(ISM))是一種廣泛應(yīng)用于熔煉某些在熔融狀態(tài)下高純度、高熔點(diǎn)極活潑合金的方法，但在工業(yè)中涉及的特種合金種類繁多，價(jià)格昂貴，熱物性值相差又很大，單靠試驗(yàn)來掌握它，不但周期長(zhǎng)、成本極高，而且有時(shí)是危險(xiǎn)的或不可能的。因此，有必要通過數(shù)值模擬的方法對(duì)于感應(yīng)凝殼熔煉過程進(jìn)行研究，以節(jié)約成本，提高效率。本研究根據(jù)合作方哈爾濱工業(yè)大學(xué)實(shí)驗(yàn)所用的水冷銅坩堝與電磁感應(yīng)線圈的規(guī)格尺寸建立實(shí)體模型，然后應(yīng)用ANSYSTM軟件對(duì)ISM過程的磁場(chǎng)強(qiáng)度、電磁力和
2、感應(yīng)加熱密度分布進(jìn)行數(shù)值模擬。通過編制用戶自定義子程序(基于c語言)，建立了ANSYSTM軟件和FLI『Eh汀刑軟件的數(shù)據(jù)接口。將ANSYSTM計(jì)算的電磁力和感應(yīng)加熱密度數(shù)據(jù)導(dǎo)入到FLU盼汀刑中，并作為源項(xiàng)分別加載到動(dòng)量和能量守恒方程中，最終應(yīng)用FLUENT刑實(shí)現(xiàn)了電磁場(chǎng)、流場(chǎng)和溫度場(chǎng)的耦合計(jì)算。通過力平衡法對(duì)感應(yīng)凝殼熔煉過程的電磁攪拌駝峰進(jìn)行了模擬，采用k—F紊流模型對(duì)感應(yīng)凝殼熔煉過程的流場(chǎng)和溫度場(chǎng)進(jìn)行了耦合模擬研究，得到了它們的分布及變化情況。模擬研究了感應(yīng)線圈加載的電流、頻率、坩堝縫數(shù)、線圈位置和爐料種類對(duì)于感應(yīng)
3、凝殼熔煉過程的懸浮駝峰形狀、溫度場(chǎng)和流場(chǎng)的影響規(guī)律。關(guān)鍵詞：感應(yīng)凝殼熔煉；數(shù)值模擬；懸浮駝峰；流場(chǎng)；溫度場(chǎng)大連理工大學(xué)碩士學(xué)位論文NumericalSimulationofThermalandFlowFieldsinInductionSkullMeltingProcess／～bstractInductionSkullMelting(ISM)isawidelyusedprocessformeltingspecialalloysthat玳veryreactiveinthemoltencondition．Experiment
4、alstudyonlyisdi銜cultformasteringthemeltingprocessingpazarnetersbecausetheISMexperimentsa∞veryexpensiveandeV吼dangerous．Therefore，thenumericalstudyishelpfulfordeterminingtheprocessingparametersofISM，whichisabothtimeandcostsavedapproach．Thegeometrymodelforsimulatio
5、nWaSbasedontheinformationprovidcdbyOI．n"cooperationpartnerfromHarbinInstituteofTechnology．TheMagneticintensity,electromagneticforceandinductionheatingdensityoftheISMprocessweresimulatedbyemployingANSY$TMsoftware．Thedatatransferinterface啷establishedbetweenANSYSTM
6、andFI1刪一byuser-definedfunction(codedbyClanguage)，andtheelectromagneticforceandinductionheatingdensitycalculatedbyANSYSTMwererespectivelyintroducedtoFLUEN一勰thesourcetermsofthemomentumconservationequationandtheenergyconservationequation．UsingFLUENTTM，withthedatafr
7、omANSYSTM，thehumpofelectromagneticsuspendinginInductionSkullMeltingprocesswassimulatedbyforcebalanceequation．ThethermalandflowcouplingfieldswerealsosimulatedbyusingtheK一￡turbulentmodel．Thedistributionandevolutionofthermalandflowfieldswereacquired．Theeffectsofthe
8、magnitudeofcurrentdensity,thefrequencyofcurrent,ertleibleslot．山erelativepositionbetwecncrucibleandcoilOnandthesortofchargeOilthethermal，flowfieldsandthefigureofhumpin
