Results 51 to 60 of about 587,209 (299)
Aerospace, 2022 X-shaped flapping wings have excellent maneuverability and flight capabilities under low-Reynolds-number conditions. An appropriate tail can extend the range of a vehicle and improve its stability.
Huadong Li +4 more
doaj +1 more source
Advanced Functional Materials, EarlyView.We report phosphine‐oxide interlayers for wide‐bandgap perovskite solar cells, in which tuned P = O Lewis basicity enables selective passivation of buried NiOx/perovskite interfaces and introduces interfacial dipoles that strengthen the built‐in field.
JeeHee Hong +6 more
wiley +1 more source
BiomimeticsThe present investigations on tandem wing configurations primarily revolve around the effects of the spacing L and the phase difference φ between the forewing and the hindwing on aerodynamic performance.
Xu He, Chao Wang, Pan Jia, Zheng Zhong
doaj +1 more source
Numerical simulation for three-dimensional rotor icing in forward flight
Advances in Mechanical Engineering, 2018 Icing will occur when helicopters pass through clouds containing supercooled droplets. The ice accreted on rotor blade affects the safety of helicopter. A numerical simulation method of helicopter rotor icing in forward flight is presented, and the icing
Zhengzhi Wang, Ning Zhao, Chunling Zhu
doaj +1 more source
Coaxial Rotor Flow Phenomena in Forward Flight [PDF]
SAE Technical Paper Series, 2016 <div class="section abstract"><div class="htmlview paragraph">Coaxial rotors are finding use in advanced rotorcraft concepts. Combined with lift offset rotor technology, they offer a solution to the problems of dynamic stall and reverse flow that often limit single rotor forward flight speeds.
Natasha Barbely, Narayanan Komerath
openaire +1 more source
Aqueous Two‐Phase Bioinks for Discrete Packing and Compartmentalization of 3D Bioprinted Cells
Advanced Healthcare Materials, EarlyView.Aqueous two‐phase systems (ATPS) enable the formation of biomimetic interfaces crucial for tissue engineering. However, clinical translation remains limited by the challenge of precisely controlling cellular compartmentalization. Here, we developed ATPS biomaterial inks for 3D bioprinting allowing tuneable droplet formation via NaCl modulation.
Martina Marcotulli +17 more
wiley +1 more source
Advanced Materials, EarlyView.Fluorene‐functionalized spiro‐phenothiazine (PTZ‐Fl) exhibits strong Li+ affinity and thermal stability, enabling a PCE of 25.75% in small‐area cells and 22.07% in 25 cm2 modules. Under ISOS‐L3 conditions, PTZ‐Flbased devices retain over 80% efficiency after 1000 hours, demonstrating superior stability and scalability compared to spiro‐OMeTAD for next ...
Javier Urieta‐Mora +17 more
wiley +1 more source
An Annular Wing VTOL UAV: Flight Dynamics and Control
Drones, 2020 A vertical takeoff and landing, unmanned aerial vehicle is presented that features a quadrotor design for propulsion and attitude stabilization, and an annular wing that provides lift in forward flight.
Rajan Gill, Raffaello D’Andrea
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Testing Backward Chaining Ab-initio Flight Instruction
International Journal of Aviation, Aeronautics, and Aerospace, 2023 This conceptual/exploratory research updates that previously published in the Journal of Aviation/Aerospace Education and Research (JAAER) Vol. 30, Issue 1 (Spring 2021) which asked if backward chaining, ab-initio pilot training decrease time to first ...
Samuel M Vance +2 more
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The effect of advance ratio on the aerodynamics of revolving wings [PDF]
, 2004 Recent studies have demonstrated that a quasi-steady model closely matches the instantaneous force produced by an insect wing during hovering flight. It is not clear, however, if such methods extend to forward flight.
Dickinson, Michael H. +1 more
core +1 more source