Title of article :
FlowandpressuredropfluctuationsinaverticaltubesubjecttolowfrequencyoscillationsOriginalResearchArticle
Author/Authors :
RajashekharPendyala، نويسنده , , SreenivasJayanti، نويسنده , , A.R.Balakrishnan، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
Heattransferandotherequipmentmountedonoff-shoreplatformsmaybesubjectedtolowfrequencyoscillations.Theeffectoftheseoscillations,typicallyinthefrequencyrangeof0.1–1Hz,ontheflowrateandpressuredropinaverticaltubehasbeenstudiedexperimentallyinthepresentwork.A1.75m-longverticaltubeofinnerdiameter0.016mwasmountedonaplateandthewholeplatewassubjectedtooscillationsintheverticalplaneusingamechanicalsimulatorcapableofprovidinglowfrequencyoscillationsintherangeof8–30cycles/minatanamplitudeof0.125m.TheeffectoftheoscillationsontheflowrateandthepressuredrophasbeenmeasuredsystematicallyintheReynoldsnumberrange500–6500.TheinducedflowratefluctuationswerefoundtobedependentontheReynoldsnumberwithstrongerfluctuationsatlowerReynoldsnumbers.Theeffectivefrictionfactor,basedonthemeanpressuredropandthemeanflowrate,wasalsofoundtobehigherthanexpected.CorrelationshavebeendevelopedtoquantifythisReynoldsnumberdependence.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
