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    Identification of Cavitation Instabilities on a Three-Bladed Inducer by Means of Strain Gages

    Source: Journal of Fluids Engineering:;2020:;volume( 142 ):;issue: 002::page 021210-1
    Author:
    Hadavandi, Ruzbeh
    ,
    Pace, Giovanni
    ,
    Valentini, Dario
    ,
    Pasini, Angelo
    ,
    d'Agostino, Luca
    DOI: 10.1115/1.4045186
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This paper reports the experimental characterization of the cavitation-induced flow instabilities of a high head three-bladed inducer at design condition detected simultaneously by means of piezoelectric pressure transducers located at different axial and azimuthal stations on the casing of the pump and strain gages mounted on the pressure side of each blade. The simultaneous analysis performed in the stationary and rotating frames, supported by high-speed movies, suggests that the mechanism of formation of the detected subsynchronous rotating cavitation resembles that of modal stall in compressors, being the cavitation region the source of compliance. In fact, at decreasing cavitation number, a strong attached cavitation, developed preferentially on one blade and capable of completely surrounding and unloading the following blade, starts to be destabilized as consequence of the progressive intensification of a modal oscillation. The developed complex instability, consisting in a strong oscillation of the attached cavitation, is detected in both the frames as the simultaneous presence of a subsynchronous rotating cavitation and a cavitation surge.
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      Identification of Cavitation Instabilities on a Three-Bladed Inducer by Means of Strain Gages

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4275591
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    contributor authorHadavandi, Ruzbeh
    contributor authorPace, Giovanni
    contributor authorValentini, Dario
    contributor authorPasini, Angelo
    contributor authord'Agostino, Luca
    date accessioned2022-02-04T22:51:51Z
    date available2022-02-04T22:51:51Z
    date copyright2/1/2020 12:00:00 AM
    date issued2020
    identifier issn0098-2202
    identifier otherfe_142_02_021210.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4275591
    description abstractThis paper reports the experimental characterization of the cavitation-induced flow instabilities of a high head three-bladed inducer at design condition detected simultaneously by means of piezoelectric pressure transducers located at different axial and azimuthal stations on the casing of the pump and strain gages mounted on the pressure side of each blade. The simultaneous analysis performed in the stationary and rotating frames, supported by high-speed movies, suggests that the mechanism of formation of the detected subsynchronous rotating cavitation resembles that of modal stall in compressors, being the cavitation region the source of compliance. In fact, at decreasing cavitation number, a strong attached cavitation, developed preferentially on one blade and capable of completely surrounding and unloading the following blade, starts to be destabilized as consequence of the progressive intensification of a modal oscillation. The developed complex instability, consisting in a strong oscillation of the attached cavitation, is detected in both the frames as the simultaneous presence of a subsynchronous rotating cavitation and a cavitation surge.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleIdentification of Cavitation Instabilities on a Three-Bladed Inducer by Means of Strain Gages
    typeJournal Paper
    journal volume142
    journal issue2
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.4045186
    journal fristpage021210-1
    journal lastpage021210-10
    page10
    treeJournal of Fluids Engineering:;2020:;volume( 142 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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