Method of calculation of a methane concentration field in gob areas with a known velocity field based on the model of stream tubes.pdfVIP

Method of calculation of a methane concentration field in gob areas with a known velocity field based on the model of stream tubes.pdf

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Method of calculation of a methane concentration field in gob areas with a known velocity field based on the model of stream tubes.pdf

MiningScienceandTechnology(China)21(2011)277-280 | | -j || 瞧皤 簿 稳 螽 懿l黪 勘 黼 翱 || | 一 i l M enCe l1_e(.hIlo Cl嘲 。| Ina、hom p矗毡 wwWie\舔蠢 鞣 誊 m|≮octem8t奄 Methodofcalculationofamethaneconcentrationfieldingobareaswithaknown velocityfieldbasedonthemodelofstream tubes W angHonggang,W uFengliang SchoolofEnergyEngineering,XianUniversityol’SdenceandTechnology,Xian710054,China A R T IC L E lN F O A B S T R A C T Artidehistory: Thecontrolequationsofgasconcentration fieldingobareaswithaknown velocity fieldareDartial Received28August2010 differentiaIequationswithvariablecoefficients.whosetraditionalmathematicalaclculationmethodsare Receivedinrevisedfom verycomplex.Anumericalsimulationmethodcanbeusedtoaclculatethegasconcentrationfield.butit 10October2010 alsoneedsconsiderableamountsofcomputerresourcesand therelationsofgasconcentration at Accepted25November2010 di舱rentpointsofthegobareaareundefined.Basedonthemodelofstream tubes.theconservation equationsofmassandgascomponentswithinthestream tubeareusedtodeducetheequationsofagas Keywords: concentration field in a gobareawith aknown velocity field.ThismethOdofcalculation ofagas Fluidfield concentrationfieldisappliedinagobareawithaU—typeventilationworkingface.whichsuggeststhat Gobarea thisnew method hasthevirtue ofexactcalculationsissimple to operateand hasaclearPhysical Concentrationfield Stream tu

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