三維高超聲速繞流流場(chǎng)并行算法研究.pdf

1、南京航空航天大學(xué)碩士學(xué)位論文三維高超聲速繞流流場(chǎng)并行算法研究姓名：余奇華申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：流體力學(xué)指導(dǎo)教師：王江峰20060201三維高超聲速繞流流場(chǎng)并行算法研究IIAbstractWiththedevelopmentofhumanbeinginskyexplationmemecountriesfocusonthehypersonictechnology(HyTech)whichincludespropulsionaerodyna

2、micsintegrationdesignetc.Tobeoneofthefundamentaltechniquesaerodynamicsaerothermaldynamicshavebeenpaidmeattentionthanothers.Limitedbythewindtunnelexperimentaltechniquesfacilitiesnumericalsimulationmethodsfhypersonicflowsb

3、ecomeanimptantwayinthisresearchfield.Thisthesisfocusonparallelnumericalmethodsfhypersonicchemicalthermalnonequilibriumflowsonhybridmeshes.TheflowsaremodeledbyEulerNSequationswithairflowchemicalreactioneffects.Numericalsc

4、hemessuchasJamesontypeschemeAUFSschemeetc.aredevelopedparallelizedondistributedmachineenvironment.a)3Dhypersonicchemicalnonequilibriumflows.SpatialdiscretizationfcontrolequationsJamesonAUFSisafinitevolumecellcenteredtype

5、explicitfivestagesRungeKuttaschemefflowtimestepping.Chemicalkiicmodelimplementedis7speciesairreactionsingletemperaturemodel.ApointimplicitschemeisusedfthechemicalsourcetermindertosolvethestiffnessproblemsaNewtoniterative

6、methodfflowfieldtemperaturedistribution.b)2Dthermochemicalnonequilibriumflows.Basedontheresultsofthefirstpartatwotemperaturemodelisemployedfthermochemicalnonequilibriumeffects.TheMillikanWhiterelaxationmodelmodifiedbyPar

7、kisusedfthecalculationofthevibrationalrelaxationtime.c)Distributedparallelization.Thedomaindecompositionmethod(DDM)isdevelopedfhybridmeshesonconsiderationofloadbalance.Datastructurebetweensubdomainsglobaldomainamongsubdo

8、mainsaredefinedasuitableparallelizationschemefhypersonicflowsolvers.Comparablenumericaltestcases2D3Dconfigurationswithdifferentflowconditionsareobtainedwhichshowstheverificationvalidationhighefficiencyrobustnessofthenume