Title of article :
Aninvestigationoftwo-phaseflowinstabilityusingwaveletsignalextractiontechniqueOriginalResearchArticle
Author/Authors :
ZhiShang، نويسنده , , RuichangYang، نويسنده , , XuewuCao، نويسنده , , YanhuaYang، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Abstract :
Whentheoscillationperiodsoftheinstabilityoftwo-phaseflowaresoughtwithtraditionalmethodsofsignalanalysis,generallytheFouriertransformmustbeemployedandthentheoscillationperiodswillbegottenatthelocationofthelocalmaximumamplitudeoffrequencytransform.However,Fouriertransformwillbedifficulttoclearlyanalyzetheunsteadysignalsespeciallywhenthesignalsincludemanypeaksandthenoiseinterferenceisnotgeneratedbywhitenoiseinmanyareasofpracticalengineeringliketheoscillationoftheinstabilityoftwo-phaseflow.ThemosteffectivesolvingmethodforthedifficultyofFouriertransformistoanalyzethesignalsdirectlyintimedomain.Waveletanalysisisabletosearchouttheperiodsfromtimedomaindirectly.ItalsohasmoreexcellentlocalcharacteristicsthanFourieranalysisinthebothoftimeandfrequencydomains.Inthispaper,notonlyisadirectdetectingmethodoftheoscillationperiodssuccessfullyappliedbasedonthewaveletsignalextractiontechniques,butalsotheoscillationofdensitywavetypeofTYPEIisfoundasakindofoscillationswithahigh-frequencyharmonization.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
