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    The Flutter Stability of Mistuned Bladed Disks Subjected to the Coriolis Effect

    Source: Journal of Engineering for Gas Turbines and Power:;2022:;volume( 145 ):;issue: 002::page 21004-1
    Author:
    Tacher, Anthony
    ,
    Thouverez, Fabrice
    ,
    Armand, Jason
    DOI: 10.1115/1.4056020
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Intentional frequency mistuning referred to as detuning is known to be an effective mean to prevent aeroelastic flutter in gas turbines. The Coriolis effect, which is usually discarded, can reduce the mistuning effects and therefore compromise the stabilizing effect of detuning with respect to flutter. This paper presents an original study of the influence of the Coriolis effect on the aeroelastic stability of a single-piece bladed disk (blisk), which made it possible to highlight for the first time the complex interactions between flutter, mistuning, and the Coriolis effect. The blisk is modeled with a lumped parameter model and the aeroelastic self-excitations using Whitehead's theory. A genetic algorithm is used to determine the best detuning pattern to stabilize the flutter-prone blisk. The results show that if the detuning pattern is identified without taking the Coriolis effect into account, the detuned blisk can still be prone to flutter. The key driver of this loss of stability is the frequency separation of the modes resulting from the Coriolis effect, which decreases the mode interactions that are required to stabilize the system. This article demonstrates the need to consider the Coriolis effect when studying the aeroelastic stability of cyclic structures with flexible disk and blade-disk coupling. By doing so, it is shown that a higher level of detuning is needed to compensate the adverse effects of Coriolis and ensure stability to flutter.
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      The Flutter Stability of Mistuned Bladed Disks Subjected to the Coriolis Effect

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4291807
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    • Journal of Engineering for Gas Turbines and Power

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    contributor authorTacher, Anthony
    contributor authorThouverez, Fabrice
    contributor authorArmand, Jason
    date accessioned2023-08-16T18:18:43Z
    date available2023-08-16T18:18:43Z
    date copyright11/28/2022 12:00:00 AM
    date issued2022
    identifier issn0742-4795
    identifier othergtp_145_02_021004.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4291807
    description abstractIntentional frequency mistuning referred to as detuning is known to be an effective mean to prevent aeroelastic flutter in gas turbines. The Coriolis effect, which is usually discarded, can reduce the mistuning effects and therefore compromise the stabilizing effect of detuning with respect to flutter. This paper presents an original study of the influence of the Coriolis effect on the aeroelastic stability of a single-piece bladed disk (blisk), which made it possible to highlight for the first time the complex interactions between flutter, mistuning, and the Coriolis effect. The blisk is modeled with a lumped parameter model and the aeroelastic self-excitations using Whitehead's theory. A genetic algorithm is used to determine the best detuning pattern to stabilize the flutter-prone blisk. The results show that if the detuning pattern is identified without taking the Coriolis effect into account, the detuned blisk can still be prone to flutter. The key driver of this loss of stability is the frequency separation of the modes resulting from the Coriolis effect, which decreases the mode interactions that are required to stabilize the system. This article demonstrates the need to consider the Coriolis effect when studying the aeroelastic stability of cyclic structures with flexible disk and blade-disk coupling. By doing so, it is shown that a higher level of detuning is needed to compensate the adverse effects of Coriolis and ensure stability to flutter.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleThe Flutter Stability of Mistuned Bladed Disks Subjected to the Coriolis Effect
    typeJournal Paper
    journal volume145
    journal issue2
    journal titleJournal of Engineering for Gas Turbines and Power
    identifier doi10.1115/1.4056020
    journal fristpage21004-1
    journal lastpage21004-10
    page10
    treeJournal of Engineering for Gas Turbines and Power:;2022:;volume( 145 ):;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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