IR
液压阀口空化流的空气型空化模型及气相可压缩性的研究
Project Number51465033
郑直
Abstract液压阀是液压系统的流体控制中枢,然而阀口在大压差、高速瞬变流中出现的空气型空化流动现象至今仍未有准确的数学描述,这已成为高性能控制阀设计、系统动态性能准确预测中的基础性难题。基于对水介质流体机械的蒸汽型空化和油介质液压阀口的空气型空化本质机理的比较分析,本项目提出了用本生溶解度输运方程描述空气型空化物理过程的思路,建立空气型空化模型,并研究空化流中气相的可压缩性;基于所提出的理论模型,对液压阀口空化流动进行数值模拟;同时开展液压阀内瞬态压力分布测量及阀口流动可视化观测实验研究,实验与数值的结果相互印证,为理论模型的参数标定提供依据,验证模型的正确性。项目的研究成果可为高性能液压阀的设计提供理论依据,对其他领域的空化流及气液两相流问题也有普遍的参考价值。【英文摘要】Hydraulicvalveisthekeyoffluidpowertransmissionandcontrolinhydraulicsystem.However,thegaseouscavitatingflow,whichoccoursinvalveportunderlargepressuregradient,highspeedtransientflowcondition,stillhavenoaccuratemathematicaldescription.Itisadifficultproblem,butitisalsothebasisforhighperformancecontrolvalvedesignandaccuratedynamicperformancepredictionofthesystem.Gaseouscavitationinoilmediumhydraulicvalvedifferssignificantlyfromvaporouscavitationinwatermediumfluidmachineryinnature.ThisprojectproposinganideaofBunsensolubilitytransportequationwhichdescribesthephysicalprocessofgaseouscavitation,establishingagaseouscavitationmodel,consideringtheinfluenceofcompressibilityofgasphase.Basedonthetheoreticalmodel,numericalinvestigationiscarriedouttopredictthehydraulicvalvecavitatingflow.Theprojectalsocarriesouthydraulicvalvetransientpressuredistributionmeasurementandthevalveportflowvisualizationexperiments.Experimentalandnumericalresultsconfirmeachother,providethebasisforthecalibrationofthetheoreticalmodelparameters,verifythecorrectnessofthemodel.Researchresultsofthisprojectcanprovidetheoreticalbasisforhighperformancehydraulicvalvedesign,alsohavegeneralreferencevalueforcavitatingflowandgas-liquidtwo-phaseflowprobleminotherfields.
Subtype地区科学基金项目
Project Source国家自然科学基金
2015-01
End Date2018-12
MOST Discipline Catalogue11 - 工程与技术 ; 1102 - 机械工程
Host Institution兰州理工大学
Project Funding500000.0
CountryCN
Language中文
Document Type项目
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64708
Collection兰州理工大学
Recommended Citation
GB/T 7714
郑直.液压阀口空化流的空气型空化模型及气相可压缩性的研究.2015.
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