管道充水过程气液两相流动力学特性分析

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1、第l1卷第5期南水北调与水利科技Vo1．11No．52013年10月South-to-NorthWaterTransfersandWaterScience&Technology0ct．2013doi：10．3724／SP．J．1201．2013．05065管道充水过程气液两相流动力学特性分析郭永鑫，吴昊潼，杨开林，郭新蕾，王涛(1．中国水利水电科学研究院流域水循环模拟与调控国家重点试验室，北京100038；2．河海大学水利水电学院，南京210098)摘要：管道充水过程涉及复杂的气液两相瞬变过程，合理分析、评价其两相动力学特性对工程的优化设计

2、、安全运行，以及数值模拟研究具有重要意义。基于量纲分析和相似理论，建立了充水过程的气相模型相似律，认为通气孔排气过程的动力相似律可近似套用重力相似律，据此推导出了管内滞留气囊原、模型的几何比尺关系。将建立的气相模型相似律应用于南水北调北京段西四环暗涵通气孔水工模型试验，分析了充水全过程中两相流各动力学测量参数，得出暗涵合理的充水流量。最后采用定量和定性分析相结合的方法，对管道中滞留气囊对输水能力的影响进行了评价。关键词：管道充水；通气孔；气液两相流；相似律；动力学参数中图分类号：TV131；0359文献标识码：A文章编号：1672—1683

3、(2013)05—0065—05AnalysisofDynamicCharacteristicsofGas-liquidFlowDuringWater-fillingProcessinPipelineGUOYong-xin1，WUHao-tong2，YANGKai-lin1，GUOXin-lei，WANGTao(1_ChinaInstituteofWaterResources＆Hydropov．erResearch，StateKeyLaboratoryofSimulationandRegulationofWaterCycleinRiverB

4、asin，BeOing100038，China；2．CollegeofWaterConservancyandHydropov．erEngineering，HohaiUniversity，N口ing210098，China)Abstract：Thewater-fillingprocessinpipelineinvolvesgas-liquidtwo-phasetransientflow．Areasonableanalysisandassessmentofthetwo-phasedynamiccharacteristicsisveryimpor

5、tantfortheoptimizationdesignandsafeoperationofengineeringprojectandnumericalsimulationstudy．Basedonthedimensionalanalysisandsimilaritytheory，thesimilaritylawsofthegas-phasemodelduringthewater-fillingprocesswereestablished，andthedynamicsimilaritylawsoftheexhaustprocessinven

6、tsweresimilartOthegravitysimilaritylaws；sthereforethegeometricproportionrelationshipofdetainedairbubblesinthepipelineintheprototypeandmodelwasobtained．Thesimilaritylawsofthegas-phasemodelwereappliedtOthehydraulicmodeltestoftheculvertairventontheWest4thRingRoadofBeijinginth

7、eSouth-to-NorthWaterDiversionProject，whichprovidedthedy—namicparametersofgas-liquidtwo-phaseflowduringthewater-fillingprocessandthereasonablewater-fillingflowrateintheculvert．Furthermore，theeffectsofthedetainedairbubblesontheconveyancecapacitywereanalyzedquantitativelyandq

8、ualita—tively．Keywords：water-fillingpipeline；airvent；gas-liquidtwo--phaseflow；similarityl