Results 51 to 60 of about 105,358 (290)

Dynamic Stall Mechanisms of Pitching Airfoil: IDDES Study Across Different Mach Numbers

Applied Sciences
This study investigates dynamic stall mechanisms of a pitching NACA 0012 airfoil through high-fidelity computational fluid dynamics (CFD) simulations.
Simeng Jing, Fan Lu, Li Ma, Qijun Zhao, Guoqing Zhao   +4 more
doaj   +1 more source

Dynamic Stall Characteristics of the Bionic Airfoil with Different Waviness Ratios

Applied Sciences, 2021
A dynamic stall will cause dramatic changes in the aerodynamic performance of the blade, resulting in a sharp increase in the blade vibration load. The bionic leading-edge airfoil with different waviness ratios, inspired by the humpback whales flipper ...
Liming Wu, Xiaomin Liu
doaj   +1 more source

Complex Structure of Dynamic Stall on Wind Turbine Airfoils [PDF]

, 2013
Fluid dynamics video demonstrating the evolution of dynamic stall on a wind turbine blade.Comment: 2 pages with 2 attached ...
Babbitt, Ashli, Davidson, Phillip, Hind, Michael, Magstadt, Andrew, Naughton, Jonathan, Nikoueeyan, Pourya, Strike, John   +6 more
core  

Pattern Formation in Non‐Equilibrium Architected Materials

Advanced Materials Technologies, EarlyView.
This article demonstrates an artificial mechanical system ‐ a robotic metamaterial ‐ as an accessible and versatile platform within which to explore and prescribe the reaction‐diffusion driven pattern formation hitherto associated with comparatively less accessible and versatile non‐equilibrium biological and chemical systems.
Vinod Ramakrishnan, Michael J. Frazier
wiley   +1 more source

Study on the Active Control of the Dynamic Stall of Rotor Airfoils Based on Plasma Excitation

Aerospace
This paper studies a rotor dynamic stall control method using an alternating current dielectric barrier discharge (AC DBD) plasma actuator through numerical simulation methods.
Weihong Kong, Keyi Guo, You Li
doaj   +1 more source

Bay‐functionalized [7]Helicene Bilayer Nanographenes

Advanced Optical Materials, EarlyView.
Bay‐functionalized [7]helical bilayer nanographenes are synthesized via a scalable, modular strategy enabling late‐stage diversification. Tailored methoxy, diketone, and phenazine substitutions precisely tune redox, photophysical, and chiroptical properties, delivering strong electronic circular dichroism and bright circularly polarized luminescence ...
Anmol Thanai, Vikas Sharma, Louis Minion, Hassan Khan, Hadeel Abbas, George F. S. Whitehead, Avantika Hasija, Jessica Wade, Matthew John Fuchter, Ashok Keerthi   +9 more
wiley   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Dynamic Stall Control by Passive Disturbance Generators [PDF]

AIAA Journal, 2011
Passive cylindrical disturbance generators mounted near the leading edge of an airfoil significantly improved its performance under dynamic stall conditions. Time-resolved particle image velocimetry and simultaneous pressure measurements were conducted at the midchord of a pitching airfoil equipped with passive disturbance generators.
Heine, Benjamin, Mulleners, Karen, Joubert, Gilles, Raffel, Markus   +3 more
openaire   +3 more sources

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

Stall Flutter Control of a Smart Blade Section Undergoing Asymmetric Limit Oscillations

Shock and Vibration, 2016
Stall flutter is an aeroelastic phenomenon resulting in unwanted oscillatory loads on the blade, such as wind turbine blade, helicopter rotor blade, and other flexible wing blades.
Nailu Li, Mark J. Balas, Pourya Nikoueeyan, Hua Yang, Jonathan W. Naughton   +4 more
doaj   +1 more source