Results 61 to 70 of about 748 (184)

Design Optimization of a Pseudo-Rigid-Compliant Mechanism for Large, Continuous, and Smooth Morphing of Airfoil Camber

Aerospace
This work introduces a novel variable camber mechanism that combines the high-load capacity, structural stability, and mechanical efficiency of rigid-body mechanisms with the adaptability, lightweight design, and continuous and smooth motion of compliant
Victor Alulema, Victor Hidalgo, Edgar Cando, Esteban Valencia   +3 more
doaj   +1 more source

Experimental and Numerical Analysis of the Aerodynamic Characteristics of the Flexing Wing With Active Camber Design

International Journal of Aerospace Engineering, Volume 2025, Issue 1, 2025.
The flexing/morphing concept is a means of improving wings’ aerodynamic performance. Morphing technology such as the fishbone active camber (FishBAC) design has demonstrated drag reduction of over 30% at moderate angles of attack (AoAs) and 40% at higher AoAs and tail deflections compared to plain flap systems.
Bassam Rakhshani, Nathalie Samson, Tony Leslie, Kan Xie   +3 more
wiley   +1 more source

Enhancing Unmanned Aerial Vehicle Performance: A Comprehensive Review of Aerodynamic Improvement Techniques at Low Reynolds Numbers

International Journal of Aerospace Engineering, Volume 2025, Issue 1, 2025.
The increasingly prominent function of unmanned aerial vehicles (UAVs) across fields ranging from logistics and surveillance to farming and research calls for ongoing innovation in their flight efficiency. This study probes the effect of making strategic alterations in the designs of UAVs’ wings, including the implementation of dogtooth shapes, on such
Mohammad Hossein Moghimi Esfandabadi, Sohrab Panahandeh Taghi-Abad, Mohammad Hassan DJavarshakian, Adel Ghenaiet   +3 more
wiley   +1 more source

SMART MORPHING CONCEPTS AND APPLICATIONS FOR ADVANCED LIFTING SURFACES

, 2009
The aim of this thesis has been the study and implementation of structural solutions for the local or global change of airplanes wing geometry (adaptive wing): they may lead to an increase in aerodynamic efficiency and reduced operating costs and ...
Barbarino, Silvestro
core   +1 more source

Design and Aerodynamic Performance Study of a Butterfly‐Inspired Vertical Axis Wind Turbine for Urban and Aviation Zone Wind Energy Applications

Modelling and Simulation in Engineering, Volume 2025, Issue 1, 2025.
This study presents the development of a butterfly‐inspired vertical axis wind turbine (BAWT), integrating drag‐ and lift‐based mechanisms inspired by biological structures. By combining Savonius rotors, known for their self‐starting capability and torque stability at low wind speeds, with airfoil blades that enhance performance at higher tip‐speed ...
Avaesprabha Charlesantonyraj, Sundhar Baskar, Senthil Kumar Madasamy, Laxana Sourirajan, Naveen Kumar Kulandaiyappan, Beena Stanislaus Arputharaj, Subhav Singh, Khristina Maksudovna Vafaeva, Parvathy Rajendran, Vijayanandh Raja, Houari Ameur   +10 more
wiley   +1 more source

Evolutionary history of an island endemic, the Azorean common quail

Molecular Ecology, Volume 33, Issue 24, December 2024.
Abstract Oceanic islands are characterized by conditions that favour diversification into endemic lineages that can be very different from their mainland counterparts. This can be the result of fast phenotypic divergence due to drift or the result of slower adaptation to local conditions. This uniqueness can obscure their evolutionary history.
Sara Ravagni, Ines Sanchez‐Donoso, Irene Jiménez‐Blasco, Pedro Andrade, Manel Puigcerver, Ana Chorão Guedes, Raquel Godinho, David Gonçalves, Manuel Leitão, Jennifer A. Leonard, José Domingo Rodríguez‐Teijeiro, Carles Vilà   +11 more
wiley   +1 more source

The topology optimization of a compliant variable-camber morphing wing

, 2021
In conventional aircrafts, lift control is achieved by using flap systems. It would be beneficial if flap systems could be replaced by a variable-camber morphing wing.
Maas, Wietske (author)
core  

The effect of twist morphing on aerodynamic performance of finite wing at low Reynolds number [PDF]

EPJ Web of Conferences
This study experimentally investigates the effect of twist morphing on the aerodynamic characteristics of a finite wing at low Reynolds numbers (Re). As the base model, a NACA 0018 airfoil with an aspect ratio of 4 is used.
Gunes Yasemin B., Eroğlu Ali Emirhan, Durhasan Tahir, Karasu İlyas, Pinar Engin   +4 more
doaj   +1 more source

Combined genetic algorithm and response surface methodology‐based bi‐optimization of a vertical‐axis wind turbine numerically simulated using CFD

Energy Science &Engineering, Volume 12, Issue 10, Page 4532-4548, October 2024.
The optimum values of moment and lift force for a vertical axis wind turbine were determined by a multi‐objective optimization methodology including response surface methodology (RSM), computational fluid dynamic (CFD), Non‐Dominated Sorting Genetic Algorithm (NSGA‐II), and the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS).
Mahdi Roshani, Fathollah Pourfayaz, Ali Gholami   +2 more
wiley   +1 more source

A Naturally Inspired Extrusion‐Based Microfluidic Approach for Manufacturing Tailorable Magnetic Soft Continuum Microrobotic Devices

Advanced Materials, Volume 36, Issue 31, August 1, 2024.
Here, microfluidics is leveraged to precisely control reaction‐diffusion (RD) processes for generating multifunctional and compartmentalized alginate‐based microfibers. This nature‐inspired RD process allows for producing sophisticated fibers acting as magnetic soft continuum robots.
Lukas Hertle, Semih Sevim, Jiawei Zhu, Vitaly Pustovalov, Andrea Veciana, Joaquin Llacer‐Wintle, Fabian C. Landers, Hao Ye, Xiang‐Zhong Chen, Hannes Vogler, Ueli Grossniklaus, Josep Puigmartí‐Luis, Bradley J. Nelson, Salvador Pané   +13 more
wiley   +1 more source