資源描述：
《高壓節(jié)流閥節(jié)流特征及流固耦合失效分析》由會(huì)員上傳分享，免費(fèi)在線(xiàn)閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、FLUIDMACHINERYVo1．42，No．6，2014文章編號(hào)：1005—0329(2014)06—0050—05高壓節(jié)流閥節(jié)流特征及流固耦合失效分析劉清友，包凱，付玉坤，李雨佳(1．油氣藏地質(zhì)及開(kāi)發(fā)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室·西南石油大學(xué)，四川成都610500；2．西南石油大學(xué)，四川成都610500)摘要：pJJtl東北地區(qū)高壓裂縫性氣藏開(kāi)發(fā)鉆井現(xiàn)場(chǎng)普遍使用的楔形節(jié)流閥為例，分析開(kāi)度與節(jié)流面積、節(jié)流壓降、流體速度的關(guān)系，并依據(jù)伯努利方程建立節(jié)流壓降與開(kāi)度、流體密度、進(jìn)iZl流量的數(shù)學(xué)模型，采用workbe
2、nch流固耦合數(shù)值模擬方法，對(duì)所述條件下的節(jié)流閥內(nèi)部流場(chǎng)和閥芯應(yīng)力分布對(duì)比分析。結(jié)果表明，楔形節(jié)流閥節(jié)流能力隨開(kāi)度的增大迅速減小，隨流體密度、進(jìn)口流量的增大而增大，在一定開(kāi)度下，由于閥腔內(nèi)流體的高速流動(dòng)，閥芯變徑臺(tái)階面與軸銷(xiāo)連接孔位置處出現(xiàn)應(yīng)力集中，同時(shí)閥芯節(jié)流面附近有明顯漩渦產(chǎn)生，引起閥芯振動(dòng)，容易導(dǎo)致斷裂失效；當(dāng)開(kāi)度較小時(shí)，節(jié)流效果顯著，含固相顆粒的流體容易造成節(jié)流閥堵塞，且高速流體對(duì)閥座沖刷引起刺漏，該分析結(jié)果與現(xiàn)場(chǎng)節(jié)流閥失效情況十分吻合。關(guān)鍵詞：節(jié)流閥；節(jié)流特征；流固耦合；流場(chǎng)分析；應(yīng)力集中；失效
3、中圖分類(lèi)號(hào)：TH137；TK037文獻(xiàn)標(biāo)志碼：Adoi：10．3969／j．issn．1005—0329．2014．06．O11ThrottlingCharacteristicsandFailureAnalysisofIlighPressureThrottleValvesbasedonFluid-solidCoupHngLIUQing．you，BAOKai，F(xiàn)UYu．kun，LIYu-jia(1．StateKeyLaboratoryofOilandGasRese~oirGeologyandExploita
4、tion，SouthwestPetroleumUniversity，Chengdu610500，China；2．SouthwestPetroleumUniversity，Chengdu610500，China；·)Abstract：TakingausedinfieldoffracturedcontinentalhJshpressuregasrese~oirdevelopmentintheNortheasternSiehuanwedgemanualthrottlevalveasanexample，inves
5、tigatedtherelationshipamongthrottleareas，pressuredrop，velocityandthrottleopening，andalsoestablishedmathematicalmodelwhichisconcernedwitllthrottleopening，fluiddensity，importedflowandpres—suredropbasedonbernoulli’Sequation．Thedistributionoftheflowfieldinsid
6、ethethrottlevalveandthespoolstressdistributionunderdiferentconditionsarecomparedandanalyzedbyusingtheworkbenchfluid—structureinteractionnumericalsimulationme~ed．Theresultssuggestthatthethrottlingabilitydecreasesquicklywiththeincreaseofthedegreesofopeningi
7、nadditionitdecreasestlItheincreaseoffluiddensityandimportedflow．Theresultssugestthatinacertaindegreeofopening．becauseofthehighspeedflowofthevalvecavityfluid，theconnectingholeofvaluecoresteppedsurfaceandpinoccur8stressconcentration，andthewedgeguidesurfacea
8、ppearsobviousvortexgenerationwhichwillcausethevalvevibrationleadingtofracturefailure；Whenthedegreesofopeningissmall，thethrottlingvalveworksefectivelyandcausesomeproblemsfrequentlybecauseofthehighpressureimpactefects
