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Wysłany: Pon 3:19, 13 Gru 2010 Temat postu: ugg boots günstig Two-phase flow measurement of t |
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Two-phase flow measurement of the gradient correlation
eonFluidFlowMeasurementinUnitedKingdom, 1975. BrannH. Statistikdersignaleherllhrungsloser8tr6mungssens ~ enUDiesertation]. InstltutfarMeBmadRegelungstechnik. Universit [t (TH) Karlsruhe, 1984 · BraunH, Fa8M,[link widoczny dla zalogowanych], SchneiderG. Theoryandapplicationofaualternativecorrelationflowmeter-ChemEngTechnol,[link widoczny dla zalogowanych], WeinhelmtFRO, 1987:353 ~ 360OntheGradientCorrelationMethodforTwo-phaseFlowRateMeasurementWangYimlng (BeljiugAgriculturalEngineeringUniversity, Beijing ~ 00083) ZhangBaofen (TsinghuaUniversity,[link widoczny dla zalogowanych], Beijing100084) Abstract - Thegradientcorrelationmethodfornon-intrusivevelocityandflowratemeasurementintwo. -Phaseflowisinvestigated. Thetrueflowratesandmeanvelocitiescanhemeasuredbyevaluatingslopeofthecross-covariancefunctionofthesignalsofappropriatelydesignedoverlappingsensors-Thearraycapacitancesensorconsistedoffourpairelectrodesandameasuringcircuitconsistedofhighfrequencygenerator,[link widoczny dla zalogowanych], impedance-voltageconverter, phase-sensitivedetector, low-passfilterandamplifieraredesigned. Acomplexcircuitwhichproducesspatialcorrelationsignalisalsodesigned. Atheoreticalmodelofgradientcorrelationmethodisderived. Byexperi'mentalresults, aseriesofcurvesoftheauto-correlation,[link widoczny dla zalogowanych], cross-correlation, cross-c0Tariancefunctionoftimeandspatialcross-correlationfunctionhavebeenobtained. Theanalysesindicatethatthearraycapacitancesensorandmeasuringcircuitcaneffe-ctivelydetectthegradientcorrelationsigna1. Thisapproachmakesitpossibletomeasurethevelocityandmassflowrateinpneumaticconveyers · Keywords: Gradientcorrelation; Measurementintwo-phaseflow; Arraycapsci-tancesensor
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