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1、安徽建筑工業(yè)學(xué)院畢業(yè)設(shè)計(jì)(論文)專業(yè)機(jī)械設(shè)計(jì)制造及其自動(dòng)化班級06城建機(jī)械2班學(xué)生姓名龍五學(xué)號06290070222課題節(jié)流閥內(nèi)部流場數(shù)值模擬分析指導(dǎo)教師黃磊2010年5月28日摘要單向節(jié)流閥是流體傳動(dòng)與控制技術(shù)中重要的基礎(chǔ)元件，節(jié)流閥內(nèi)部的流場特性直接影響節(jié)流閥的性能。本文結(jié)合計(jì)算流體動(dòng)力學(xué)CFD(ComputationalFluidDynamics)軟件FLUENT對節(jié)流閥的內(nèi)部流場進(jìn)行了數(shù)值模擬與分析計(jì)算。本文按照實(shí)際使用中的節(jié)流閥的參數(shù)，采用SolidWorks軟件，建立了閥的三維幾何模型。運(yùn)用FLUENT前
2、處理軟件GAMBIT了網(wǎng)格的劃分。在FLUENT軟件中對兩種模型的流場進(jìn)行了穩(wěn)態(tài)數(shù)值模擬。在主閥閥芯的性狀不同、邊界條件相同和節(jié)流口開口寬度不同、邊界條件相同時(shí)對流場進(jìn)行模擬，找出影響閥芯壓力和速度分布的因素。在對主閥口進(jìn)行模擬時(shí)，分別對比不同開口寬度時(shí)的沿程壓力分布情況，進(jìn)而選擇出最適合此處的主閥閥芯性狀和開口寬度。對阻尼小孔進(jìn)行數(shù)值模擬時(shí)，重點(diǎn)考慮節(jié)流閥開口處兩端的壓力差，找到兩端壓力差小的阻尼孔直徑數(shù)值。關(guān)鍵詞:單向節(jié)流閥，內(nèi)部流場，數(shù)值模擬ABSTRACTUnidirectionalThrottleValve
3、isafluidtransmissionandcontroltechnologybasedonthemostimportantcomponents,valvereliefvalvewithintheflowfieldcharacteristicsofadirectimpactontheperformanceofvalves.Inthispaper,computationalfluiddynamicsCFD(ComputationalFluidDynamics)softwareFLUENTforPilot-operat
4、edreliefvalveoftheflowfieldcalculationandanalysisofnumericalsimulation.Inthispaper,accordingtotheactualuseofthePilot-operatedreliefvalveoftheparameters,theuseofSolidWorkssoftware,theestablishmentofaPilot-operatedreliefvalveofthethree-dimensionalgeometricmodel.F
5、LUENTsoftware,theuseofpre-treatmentworksGAMBITdivisionofthegrid.FLUENTsoftwareintwomodelsoftheflowfieldofthenumericalsimulationofsteady-state.Spoolvalveinthemaintraitsofthedifferentboundaryconditionsanddampingthesameholediameterisdifferentfromthesameboundarycon
6、ditionstosimulatetheflowfieldtoidentifytheimpactofpressureandvelocitydistributionspoolfactors.Mainvalveportinthesimulation,themainvalve,respectively,comparedtothestructureofsphericalconevalveconepeacefulsideofthevalvestructureofthedistributionofpressurealongthe
7、way,andthenselectthemostappropriateheretraitsofthemainvalvespool.Dampingholesonthenumericalsimulation,thefocusonsmalldampingofthepressuredifferenceatbothendstofindthepressuredifferenceatbothendsofthesmalldiameterofthedampingvalue.KEYWORDS:UnidirectionalThrottle
8、Valve,theflowfield,numericalsimulation目錄目錄Ⅲ第一章緒論11.1引言11.2節(jié)流閥的用途21.3單向節(jié)流閥31.3.1節(jié)流口堵塞原因41.3.2減輕節(jié)流口堵塞的措施41.3.3單向流閥的特點(diǎn)41.4節(jié)流閥的歷史研究成果61.5國內(nèi)外利用CFD軟件對液壓閥的研究狀況71.6單向節(jié)流閥的未來發(fā)展81.7選題的
