简介:HighlyunderexpandedaxisymmetricjetwassimulatedusingtheRunge-KuttaDiscontinuousGalerkin(RKDG)finiteelementmethod,which,basedontwo-dimensionalconservationlaws,wasusedtosolvetheaxisymmetricEulerequations.Thecomputedresultsshowthatthecomplicatedflowfieldstructuresofinterest,includingshockwaves,slipstreamsandthetriplepointobservedinexperimentscouldbewellcapturedusingtheRKDGfiniteelementmethod.Moreover,comparisonsoftheMachdisklocationexhibitexcellentagreementsbetweenthecomputedresultsandexperimentalmeasurements,indicatingthatthismethodhashighcapabilityofcapturingshockswithoutnumericaloscillationandartificialviscosityoccurringnearthediscontinuouspoint.