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Seong Hyun Hong, Young Jin Kim, Soo Hyung Park, Sung Nam Jung and Ki Ro Kim
The air and structural loads of a 5-ton class light helicopter (LH) rotor in a 2.24 g pull-up maneuver are investigated using a coupling between the computational structural dynamics (CSD) and computational fluid dynamics (CFD) methods. The LH rotor is c...
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Ivan Kostic, Aleksandar Simonovic, Olivera Kostic, Du?an Ivkovic and Dragoljub Tanovic
This paper presents the second stage of a tandem fixed-wing unmanned aerial vehicle (UAV) aerodynamic development. In the initial stage, the UAV was optimized by analyzing its characteristics only in symmetrical flight conditions. Posted requirements wer...
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Weihong Kong and You Li
The large reverse flow region of the rotor with a high advance ratio is an important factor that affects the performance improvement of helicopters. This paper examines the dynamic stall of the airfoil in the reverse flow region of the rotor to develop a...
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Xufei Yan, Ye Yuan and Renliang Chen
This paper studies the pilot control strategy and workload of a tilt-rotor aircraft dynamic conversion procedure between helicopter mode and fixed-wing mode. A nonlinear flight dynamics model of tilt-rotor aircraft with full flight modes is established. ...
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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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Junwei Yang, Hua Yang, Xiangjun Wang and Nailu Li
The present work aimed to investigate the aerodynamic characteristics of a pitching wind turbine airfoil with a Gurney flap under turbulent inflow. Experiments were carried out for the DTU-LN221 offshore wind turbine airfoil under different turbulence le...
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Sijia Jia, Zhenkai Zhang, Haibo Zhang, Chen Song and Chao Yang
This paper introduces the realization and wind tunnel testing of a novel variable camber wing equipped with compliant morphing trailing edges. Based on the aerodynamic shape and compliant mechanisms that were optimized in advance, a wind tunnel model cal...
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Mingming Zhang, Pan Kong, Anping Hou, Aiguo Xia, Wei Tuo and Yongzhao Lv
In order to effectively identify the signs of instability in the aerodynamic system of an axial compressor, a wavelet singular spectral entropy algorithm incorporated within the wavelet transform, singular value decomposition and information entropy is p...
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Andrea Aprovitola, Francesco Aurisicchio, Pasquale Emanuele Di Nuzzo, Giuseppe Pezzella and Antonio Viviani
Reduction of atmospheric emissions is currently a mandatory requirement for aircraft manufacturers. Several studies performed on Blended Wing?Body configurations showed a promising capability of reducing fuel consumption by increasing, at the same time, ...
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Yin Ruan and Manfred Hajek
Dynamic stall is a phenomenon on the retreating blade of a helicopter which can lead to excessive control loads. In order to understand dynamic stall and fill the gap between the investigations on pitching wings and full helicopter rotor blades, a numeri...
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