Insight into Damping Sources in Turbines

• Autorzy: Moneta Grzegorz

Identyfikatory

DOI

10.2478/fas-2022-0006

• Języki publikacji: EN

Abstrakty

EN

Blade vibrations in aircraft engines are a significant challenge that must be overcome during the design and development of modern turbine engines. Vibrations lead to cyclic displacements and result in alternating stress and strain in undesired environments (high temperatures, erosion, corrosion of the surface, etc.). Under resonance conditions, stress amplitudes can increase and exceed their safety limits, and in extreme cases, can lead to engine failure. One method to reduce resonance vibrations is to increase damping in the turbine assembly. This paper presents and describes vibration damping sources in the turbine, including aerodynamic, material, and friction damping. Additionally, typical damping values for each damping component are presented and compared.

Słowa kluczowe

EN

vibrations; blade; gas turbine; turbine engine; damping; FEM; Finite Element Method; transient analysis; explicit; friction damping; under-platform damper; optimization; sensitivity analysis

• Wydawca: Wydawnictwa Naukowe Sieci Badawczej Łukasiewicz - Instytutu Lotnictwa
• Czasopismo: Fatigue of Aircraft Structures
• Rocznik: 2022
• Tom: Iss. 14
• Strony: 69--82
• Opis fizyczny: Bibliogr. 33 poz., rys., tab., wykr., wzory

Twórcy

autor

Moneta Grzegorz

• Łukasiewicz Research Network, Institute of Aviation, Al. Krakowska 110/114 Warsaw, Poland

• https://orcid.org/0000-0003-3899-1957

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