THE FLUCTUATION CHARACTERISTICS OF NATURAL AND VENTILATED CAVITIES ON AN AXISYMMETRIC BODY-中国期刊网

摘要 Naturalandventilatedcavitationsgeneratedonasmooth-nosedaxisymmetricbodywerestudiedexperimental-ly.Thecharacteristicsofsmallscaleandlocalizedfluctuationsof'steadycavities'weremeasuredbypressuretransducers.Comparisonsbetweennaturalandventilatedcavitiesatdiffer-entmeasuredpointsforseveralcavitationnumbersweredone.Itwasobservedthatthedominantfluctuationswereconcen-tratedinthefrequencyrangeofOHz-50Hzforallthecavitati-oncases,Similarshapesandmagnitudesofthefrequencyspectraweredetectedforbothnaturalandventilatedcavities.Muchlargerspectralamplitudeinthecavityclosureregionsuggestedasfluctuationssource.Frompartialcavitatingflowtosupercavitatingflow,thedominatfrequencyandthecorre-spondingamplitudedecreasedwithdecrasingcavitationnum-ber,whichmeantthatcavitybecamemoresteadywhiledevel-oping.

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THE FLUCTUATION CHARACTERISTICS OF NATURAL AND VENTILATED CAVITIES ON AN AXISYMMETRIC BODY

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THE FLUCTUATION CHARACTERISTICS OF NATURAL AND VENTILATED CAVITIES ON AN AXISYMMETRIC BODY

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