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contributor authorTrafford, Alexander
contributor authorStapelfeldt, Sina
date accessioned2025-04-21T10:36:53Z
date available2025-04-21T10:36:53Z
date copyright11/22/2024 12:00:00 AM
date issued2024
identifier issn0742-4795
identifier othergtp_147_05_051014.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4306553
description abstractThis paper reports the results of computational studies of the effect of combustor exit temperature distortions on low engine order (LEO) forced response of a high pressure turbine (HPT). Forced response of this kind occurs at frequencies below the stator vane passing frequency (SVPF) and can be a major cause of high cycle fatigue in turbines due to its tendency to excite fundamental modes of vibration. This paper investigates the extent through which temperature distortions act as a forcing stimulus in HPT rotor rows, through measuring unsteady pressure and modal force magnitude recorded from full annulus unsteady simulations of the MT1 stage: a low temperature, unshrouded, HPT rig. Rotor relative incidence angle variations are shown to be the key mechanism through which temperature acts as a forcer in HPT rotor rows while temperature-driven forced response is shown to be dependent on the magnitude of the modal content of the upstream temperature waves. These findings are used to build a reduced domain tool for blocked burner forced response prediction, which is shown to be accurate to a root mean squared (RMS) error of 2.66%, far beyond the current accepted standard for forcing prediction of this kind.
publisherThe American Society of Mechanical Engineers (ASME)
titleA Computational Study of Temperature-Driven Low Engine Order Forced Response in High Pressure Turbines
typeJournal Paper
journal volume147
journal issue5
journal titleJournal of Engineering for Gas Turbines and Power
identifier doi10.1115/1.4066825
journal fristpage51014-1
journal lastpage51014-12
page12
treeJournal of Engineering for Gas Turbines and Power:;2024:;volume( 147 ):;issue: 005
contenttypeFulltext


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