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时间:2019-11-27
《计算网格对气动力气动热数值模拟影响的研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、½47þ½2ÿ!"1SUVVol.47No.22017#3$AeronauticalComputingTechniqueMar.2017!"#$%&'(&')*+,-./012!"#,$%&(!"#$%&'()*+,-.()!/,01101304)34:'()*+,-./01234567,89:;1<=>?@45A:;BCDEF=GEFHIJKLMNOP。:;QRM61S、TUSVWX9AUSMCYZM[VCY]U,^9_`Runge?KuttaaYbcde@fghc]UiNjk?Q。:;lmno,pq@rstuBCcv、BCwxy'GTz{
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4、。IE1¡¢pq£¤¥¦0{§{'G¨{§{,©ª§{N«¬:;®¯°Npq@rstuBCcv'G¯±NBCwxy、Tz{。567:BC;:;1<=>;IJKL;*+,-89:;<:V211.3=>?@A:A=BC<:1671?654X(2017)02?0001?04GridStudyonNumericalSimulationofAerodynamicflowfieldYANWen?hui,RENLi?lei(SystemEngineeringResearchCenter,AeroEngineAcademyofChina,
5、Beijing101304,China)Abstract:Numericalsimulationoftwo?dimesionalcylinderblunthypersonicflowfieldisconductedbymeansofcomputationalfluiddynamicmethod.Meshinfluencesarestudiedinpresentcalculation.Inourprocedure,convectiontermsanddiffusiontermsarecalculatedusingAUSM(AdvectionUpwindSplittingMethod)sche
6、meandCD(CenterDifference)scheme,respectively.TheRunge?Kuttatimemarchingmethodisemployedtoslovespacediscretecontrolequations.Thefristnormalgridspace,length?widthratioandexpansionratioaffectnumericalsimulation,especialnormalgridspaceonthesylinderwall.Comparisonbetweenthecomputationalresultsandexpe
7、rimentalvaluesarecarriedoutincludingsurfacepressurecoefficientsCpandStantonnumberSt.Accuratecalculationforthegreatvelocityandtemperaturegradientsistheprimaryreasonthatstrictlyrequestgridquality.Keywords:grid;compuationalfluiddynamics;numericalsimulation;cylinderbluntDE¨。©ª$«¬®¯°±)C5X_gcd^²,x³´µ^!
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