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Yi Wang, Bin Guo, Fengmei Jing and Yunlei Mei
In order to gain a more comprehensive understanding of the influence of winglets on the hydrodynamic performance and flow field characteristics of tidal current energy turbines, two different shapes of winglets are designed, and numerical simulation resu...
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Viktor Popov,Vasiliy Loginov,Yevgen Ukrainets,Volodymyr Shmyrov,Petro Steshenko,Pavlo Hlushchenko
Pág. 51 - 59
Improving the aircraft?s fuel efficiency is one of the main requirements for prospective and modernized aircraft. This paper reports the assessment of change in aerodynamic quality resulting in the improved fuel efficiency of a long-range aircraft when u...
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Maria Chiara Noviello, Ignazio Dimino, Antonio Concilio, Francesco Amoroso and Rosario Pecora
The application of morphing wing devices can bring several benefits in terms of aircraft performance, as the current literature shows. Within the scope of Clean Sky 2 AirGreen 2 European project, the authors provided a safety-driven design of an adaptive...
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Ignazio Dimino, Federico Gallorini, Massimiliano Palmieri and Giulio Pispola
As a key enabler for future aviation technology, the use of servo electromechanical actuation offers new opportunities to transition innovative structural concepts, such as biomimicry morphing structures, from basic research to new commercial aircraft ap...
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Joel Guerrero, Marco Sanguineti and Kevin Wittkowski
Winglets are commonly used drag-reduction and fuel-saving technologies in today?s aviation. The primary purpose of the winglets is to reduce the lift-induced drag, therefore improving fuel efficiency and aircraft performance. Traditional winglets are des...
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Joel Guerrero, Marco Sanguineti and Kevin Wittkowski
Winglets are commonly used drag-reduction and fuel-saving technologies in today’s aviation. The primary purpose of the winglets is to reduce the lift-induced drag, therefore improving fuel efficiency and aircraft performance. Traditional winglets a...
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Pericles Panagiotou, George Ioannidis, Ioannis Tzivinikos and Kyros Yakinthos
An experimental investigation of the wake of an Unmanned Aerial Vehicle (UAV) model using flow visualization techniques and a 3D Laser Doppler Anemometry (LDA) system is presented in this work. Emphasis is given on the flow field at the wingtip and the i...
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Pericles Panagiotou, George Ioannidis, Ioannis Tzivinikos and Kyros Yakinthos
An experimental investigation of the wake of an Unmanned Aerial Vehicle (UAV) model using flow visualization techniques and a 3D Laser Doppler Anemometry (LDA) system is presented in this work. Emphasis is given on the flow field at the wingtip and the i...
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Wencai Zhu and Hongtao Gao
The generation of tip vortex cavitation (TVC) is a common phenomenon in marine propellers. Therefore, it is important to find a way for the effective suppression of TVC. Based on the enlightenment of bionics, a propeller with winglets was numerically inv...
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Jin-Cherng Shyu and Jhao-Siang Jheng
Because the delta winglet in common-flow-down configuration has been recognized as an excellent type of vortex generators (VGs), this study aims to experimentally and numerically investigate the thermo-hydraulic performance of four different forms of win...
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Nicolas Tobin, Ali M. Hamed and Leonardo P. Chamorro
Wind tunnel experiments were performed to investigate the effects of downstream-facing winglets on the wake dynamics, power and thrust of a model wind turbine. Two similar turbines with and without winglets were operated under the same conditions. Result...
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Ilias Lappas and Akira Ikenaga
An increasing number of aircraft is equipped with wing tip devices, which either are installed by the aircraft manufacturer at the production line or are retrofitted after the delivery of the aircraft to its operator. The installation of wing tip devices...
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Shutong Huang, Ju Jiang and Ouxun Li
In order to obtain good flight performance in the near-space morphing vehicle (NMV) cruise phase, this paper proposes an adaptive sliding mode backstepping control scheme based on a neural network, aiming at the reduction of elevator control efficiency a...
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Ángel Antonio Rodríguez-Sevillano, Rafael Bardera-Mora, Alejandra López-Cuervo-Alcaraz, Daniel Anguita-Mazón, Juan Carlos Matías-García, Estela Barroso-Barderas and Jaime Fernández-Antón
The paper outlines an algorithm for the rapid aerodynamic evaluation of winglet geometries using the TORNADO Vortex Lattice Method. It is a very useful tool to obtain a first approximation of the aerodynamic properties and for performing an optimization ...
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Djahid Gueraiche and Sergey Popov
In this article, the growth of aerodynamic efficiency and the growth of the wing structural stress is studied for DLR-F4 typical transport aircraft wing-body, after installing classical Whitcomb winglets of different configurations and a delta wingtip fe...
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Djahid Gueraiche and Sergey Popov
In this article, the growth of aerodynamic efficiency and the growth of the wing structural stress is studied for DLR-F4 typical transport aircraft wing-body, after installing classical Whitcomb winglets of different configurations and a delta wingtip fe...
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Nyoman Ade Satwika, Ridho Hantoro, Sarwono Sarwono, Gunawan Nugroho
Pág. 345 - 360
HAWT with three blades is often used, because it has the highest power coefficient among other turbines. The airfoil used is Clark-Y type because it has high glide ratio (coefficient lift/coefficient drag) in the application of subsonic flow. The main pu...
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Jonna Tiainen, Aki Grönman, Ahti Jaatinen-Värri and Jari Backman
The decrease in the performance of centrifugal compressors operating at low Reynolds numbers (e.g., unmanned aerial vehicles at high altitudes or small turbomachines) can reach 10% due to increased friction. The purposes of this review are to represent t...
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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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Karmveer, Naveen Kumar Gupta, Tabish Alam, Raffaello Cozzolino and Gino Bella
Solar air heater is considered to be the most popular and widely used solar thermal system. Solar air heater (SAH) can be used in many applications, ranging from domestic to industrial purposes. However, it seems that the viability of SAH is not feasible...
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