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portada Effects of Inlet Distortion on Aeromechanical Stability of a Forward-Swept High-Speed Fan
Type
Physical Book
Publisher
Language
English
Pages
24
Format
Paperback
Dimensions
24.6x18.9x0.1 cm
Weight
0.06 kg.
ISBN13
9781289167486

Effects of Inlet Distortion on Aeromechanical Stability of a Forward-Swept High-Speed Fan

Nasa Technical Reports Server (Ntrs) (Author) · Gregory P. Herrick (Author) · Bibliogov · Paperback

Effects of Inlet Distortion on Aeromechanical Stability of a Forward-Swept High-Speed Fan - Herrick, Gregory P. ; Nasa Technical Reports Server (Ntrs)

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R 379
R 379

Synopsis "Effects of Inlet Distortion on Aeromechanical Stability of a Forward-Swept High-Speed Fan"

Concerns regarding noise, propulsive efficiency, and fuel burn are inspiring aircraft designs wherein the propulsive turbomachines are partially (or fully) embedded within the airframe; such designs present serious concerns with regard to aerodynamic and aeromechanic performance of the compression system in response to inlet distortion. Separately, a forward-swept high-speed fan was developed to address noise concerns of modern podded turbofans; however this fan encounters aeroelastic instability (flutter) as it approaches stall. A three-dimensional, unsteady, Navier-Stokes computational fluid dynamics code is applied to analyze and corroborate fan performance with clean inlet flow. This code, already validated in its application to assess aerodynamic damping of vibrating blades at various flow conditions, is modified and then applied in a computational study to preliminarily assess the effects of inlet distortion on aeroelastic stability of the fan. Computational engineering application and implementation issues are discussed, followed by an investigation into the aeroelastic behavior of the fan with clean and distorted inlets.

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