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Keyvan Salehi Paniagua, Pablo García-Fogeda and Félix Arévalo
In this work, the aeroelastic stability of an aerial refueling system is investigated. The system is formed by a classical hose and drogue, and the novelty of our work is the inclusion of a grid fin configuration to improve its stability. The unsteady ae...
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George Hill, Julian Gambel, Sabine Schneider, Dieter Peitsch and Sina Stapelfeldt
Modern aeroengine designs strive for peak specific fuel and thermal efficiency. To achieve these goals, engines have more highly loaded compressor stages, thinner aerofoils, and blended titanium integrated disks (blisks) to reduce weight. These configura...
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Xin Liu, Yu Fan, Lin Li and Xiaoping Yu
Understanding the mechanism of the aeroelastic stability improvement induced by mistuning is essential for the design of bladed disks in aero-engines. In this paper, a quantitative interpretation is given. It starts by projecting the mistuned aeroelastic...
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Marco Rauseo, Mehdi Vahdati and Fanzhou Zhao
Aeroelastic instabilities such as flutter have a crucial role in limiting the operating range and reliability of turbomachinery. This paper offers an alternative approach to aeroelastic analysis, where the sensitivity of aerodynamic damping with respect ...
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Mohammadreza Amoozgar, Michael I. Friswell, Seyed Ahmad Fazelzadeh, Hamed Haddad Khodaparast, Abbas Mazidi and Jonathan E. Cooper
In this paper, the effect of distributed electric propulsion on the aeroelastic stability of an electric aircraft wing was investigated. All the electric propulsors, which are of different properties, are attached to the wing of the aircraft in different...
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Jonathan Hilger and Markus Raimund Ritter
The Pazy wing aeroelastic benchmark is a highly flexible wind tunnel model investigated in the Large Deflection Working Group as part of the Third Aeroelastic Prediction Workshop. Due to the design of the model, very large elastic deformations in the ord...
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Marco Berci and Francesco Torrigiani
A comparative sensitivity study for the flutter instability of aircraft wings in subsonic flow is presented, using analytical models and numerical tools with different multidisciplinary approaches. The analyses build on previous elegant works and encompa...
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Tianrui Sun, Anping Hou, Mingming Zhang and Paul Petrie-Repar
In this paper, the tip clearance effects on the aeroelastic stability of a last-stage steam turbine model are investigated. Most of the unsteady aerodynamic work contributing to flutter of the long blades of the last-stage of a steam turbine is done near...
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Jianxiong Li, Xiaodong Yang, Anping Hou, Yingxiu Chen and Manlu Li
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 ...
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Shijun Guo, Jaime Espinosa De Los Monteros and Ying Liu
This paper presents an investigation into the gust response and wing structure load alleviation of a 200-seater aircraft by employing a passive twist wingtip (PTWT). The research was divided into three stages. The first stage was the design and analysis ...
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Aniello Daniele Marano, Marika Belardo, Jacopo Beretta, Filomena Starace, Salvatore Orlando, Claudio Punzi, Raffaele Frajese, Nicola Paletta and Luigi Di Palma
The tiltrotor wing structure is one of the most critical and heavily investigated structures in design due to the fundamental need to consider the interactions between the wing, pylon, and rotor systems to achieve aircraft aeroelastic stability. Indeed, ...
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Valdo Pagès, Pierre Duquesne, Stéphane Aubert, Laurent Blanc, Pascal Ferrand, Xavier Ottavy and Christoph Brandstetter
The application of composite fans enables disruptive design possibilities but increases sensitivity to multi-physical resonance between aerodynamic, structure dynamic and acoustic phenomena. As a result, aeroelastic problems increasingly set the stabilit...
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Daniel Franke, Daniel Möller, Maximilian Jüngst, Heinz-Peter Schiffer, Thomas Giersch and Bernd Becker
This study investigates the aerodynamic and aeroelastic characteristics of a transonic axial compressor, focusing on blade count reduced rotor behavior. The analysis is based on experiments, conducted at the Transonic Compressor Darmstadt test rig at Tec...
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Matthias Schulze, Jens Neumann and Thomas Klimmek
The purpose of this paper is to investigate the influence of the engine position and mass as well as the pylon stiffness on the aeroelastic stability of a long-range wide-body transport aircraft. As reference configuration, DLR?s (German Aerospace Center...
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Min-Soo Jeong, In Lee, Seung-Jae Yoo and Kwang-Choon Park
Aeroelastic instability problems have become an increasingly important issue due to the increased use of larger horizontal axis wind turbines. To maintain these large structures in a stable manner, the blade design process should include studies on the d...
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Changkun Yu, Zhigang Wu and Chao Yang
Slender vehicles often encounter significant aeroservoelastic challenges due to their low elastic mode frequencies and wide servo control system bandwidths. Traditional analysis methods have limitations, including low modeling accuracy for real vehicles ...
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Christoph Brandstetter and Sina Stapelfeldt
The prediction accuracy of aeroelastic stability in fans and compressors depends crucially on the accuracy of the underlying aerodynamic predictions. The prevalent approach in the field solves the unsteady Reynolds-averaged Navier?Stokes equations in the...
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Zhao Yang and Jie Li
Aeroelastic deformation of the high-aspect-ratio wing from a solar-powered UAV will definitely lead to the difference of its performance between design and actual flight. In the present study, the numerical fluid?structural coupling analysis of a wing wi...
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Marco Casoni and Ernesto Benini
Aeroelastic phenomena in turbomachinery are one of the most challenging problems to model using computational fluid dynamics (CFD) due to their inherent nonlinear nature, the difficulties in simulating fluid?structure interactions and the considerable co...
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Jared A. Grauer and Matthew J. Boucher
System identification from measured flight test data was conducted using the X-56A aeroelastic demonstrator to identify a longitudinal flight dynamics model that included the short period, first symmetric wing bending, and first symmetric wing torsion mo...
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