contributor author | Tacher, Anthony | |
contributor author | Thouverez, Fabrice | |
contributor author | Armand, Jason | |
date accessioned | 2023-08-16T18:18:43Z | |
date available | 2023-08-16T18:18:43Z | |
date copyright | 11/28/2022 12:00:00 AM | |
date issued | 2022 | |
identifier issn | 0742-4795 | |
identifier other | gtp_145_02_021004.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4291807 | |
description 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. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | The Flutter Stability of Mistuned Bladed Disks Subjected to the Coriolis Effect | |
type | Journal Paper | |
journal volume | 145 | |
journal issue | 2 | |
journal title | Journal of Engineering for Gas Turbines and Power | |
identifier doi | 10.1115/1.4056020 | |
journal fristpage | 21004-1 | |
journal lastpage | 21004-10 | |
page | 10 | |
tree | Journal of Engineering for Gas Turbines and Power:;2022:;volume( 145 ):;issue: 002 | |
contenttype | Fulltext | |