Results 11 to 20 of about 36,766 (308)
Vehicles, 2023 Modern power engine concepts and environmental restrictions demand oil-free lubrication of rotors, for example, by gas bearings. However, the stiffness and damping properties ruling the rotor’s dynamics are poorly documented for aerodynamic bearings and ...
Katrin Baumann, Hermann Freund
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Cross-Wind Aeroelastic Effects of Tall Buildings with a Hexagonal Cross-Section
Atmosphere, 2023 This research investigates the cross-wind aeroelastic effects of tall buildings with hexagonal cross-sections by using aeroelastic models with multiple-degree-of-freedom (MDOF).
Yuhui Fan, Jingwen Lu, Lei Wang
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Flutter and forced response of mistuned rotors using standing wave analysis [PDF]
, 1983 A standing wave approach is applied to the analysis of the flutter and forced response of tuned and mistuned rotors. The traditional traveling wave cascade airforces are recast into standing wave arbitrary motion form using Pade approximants, and the ...
Also M. +7 more
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Applied Sciences, 2019 Aerodynamic damping predictions are critical when analyzing aeroelastic stability. A novel method has been developed to predict aerodynamic damping by employing two single time-domain simulations, specifically, one with the blade impulsed naturally in a ...
Jianxiong Li +4 more
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Aerodynamic Damping in Turbomachinery [PDF]
ASME 1972 International Gas Turbine and Fluids Engineering Conference and Products Show, 1972 An experimental study of aerodynamic damping has been carried out on an axial compressor in which stagger angle, pressure ratio, and relative velocity was varied. The study utilized explosive charges buried in the tip of the blade to provide excitation and found the damping by measuring the log decrement of the vibrations.
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Tip Clearance Influence on Aerodynamic Damping Maps [PDF]
European Conference on Turbomachinery Fluid Dynamics and hermodynamics, 2017 This paper aims to investigate the influence of tip clearance on aerodynamic damping maps of an oscillating low pressure turbine (LPT) unshrouded blade row. Full-scale time-marching RANS CFD simulations in ANSYS CFX® v.16.2 employing models with 0%, 1%, 2% and 3% of span tip clearance are adopted.
Mateus Augusto Malta Teixeira +1 more
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Calculation of AGARD Wing 445.6 Flutter Using Navier-Stokes Aerodynamics [PDF]
, 1993 An unsteady, 3D, implicit upwind Euler/Navier-Stokes algorithm is here used to compute the flutter characteristics of Wing 445.6, the AGARD standard aeroelastic configuration for dynamic response, with a view to the discrepancy between Euler ...
Anderson W. K. +21 more
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Aerospace, 2022 The numerical assessment of T-tail flutter requires a nonlinear description of the structural deformations when the unsteady aerodynamic forces comprise terms from lifting surface roll motion.
Dominik Schäfer
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Energies, 2019 The development of wind turbine technology has led to higher and larger wind turbines with a higher sensitivity to dynamic effects. One of these effects is the aerodynamic damping, which introduces favorable damping forces in oscillating wind turbines ...
Robert Fontecha +2 more
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Identification of aerodynamic damping matrix for operating wind turbines [PDF]
Mechanical Systems and Signal Processing, 2021 Abstract Accurate knowledge of wind turbine tower vibration damping is essential for the estimation of fatigue life. However, the responses in the fore-aft and side-side directions are coupled through the wind-rotor interaction under operational conditions.
Chen, C +4 more
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