›› 2015, Vol. 35 ›› Issue (1): 66-74.doi: 10.3780/j.issn.1000-758X.2015.01.009

Previous Articles     Next Articles

ApplicationofaNewAblationThermalResponseAlgorithminMassEstimation

WANGJun1, YANGYang2, ZHOUYi1, CHAIXiuli1   

  1. (1InstituteofImageProcessingandPatternRecognition,HenanUniversity,Kaifeng475004)(2LuoheVocationalandTechnicCollege,Luohe462000)
  • Received:2014-04-22 Revised:2014-09-02 Online:2015-02-25 Published:2015-02-25

Abstract: Themasslossesofheatshieldsurfacematerialssubjecttotheablationthermalresponseresultingfromaerodynamicheatfluxcanbeefficientlyestimatedinthereentryprocess.Ageometricmodelandablationmassestimationmethodofheatshieldswasstudied.Thethreedegreeoffreedom(3DOF)reentrytrajectorydynamicsequationwasestablished.ThemodifiedNewtonianflowtheory,Detra-Kemp-RiddellandTauber-Suttontheorywereadoptedrespectivelytocalculatetheaerodynamicparameters,stagnationheatfluxandheatradiation.Aone-dimensionalnonlinearheatconductionmodelwasemployedtosimulatetheprocessofcharringmaterialablation. BasedontheNewton-RaphsonandTDMAablationthermalresponsealgorithm, anapproachwaspresentedtoestimatethemasslossesofvehicleheatshields. Theresultsofablationpredictionshowthatthecontinuousdynamicchangeofthesurfacematerialdepthcanberealizedbyanalyzingtheablationthermalresponsealgorithm.Thepresentedapproachcanbeanavailablesurrogateofheatbalanceintegral(HBI)method.Theestimatedablationmasscanhelptooptimizethegeometricmodelofheatshieldsandreentrytrajectory.

Key words: Ablationthermalresponse, Heatshield, Reentryvehicle, Masslosses, Finiteelementmethod