Results 61 to 70 of about 10,614 (216)
Aerodynamic analysis and modeling of coaxial ducted fan aircraft with the ceiling effect
Engineering Applications of Computational Fluid Mechanics, 2021 In this study, a novel coaxial ducted aircraft structure is considered, based on which the flow field with the ceiling effect under different vertical velocities and heights is obtained by exploiting the CFD (Computational Fluid Dynamics) numerical ...
Tianfu Ai +5 more
doaj +1 more source
Energy Science &Engineering, Volume 14, Issue 4, Page 1935-1951, April 2026.This paper aims to provide a robust design approach for HAWTs operating in shear flow. This study fills a critical research gap by integrating BEM and vortex theories for blade design in non‐homogeneous inflow conditions. The authors of the paper made an effort to develop and test an experimentally unsophisticated model of a turbine working in shear ...
Agnieszka Dorota Woźniak +2 more
wiley +1 more source
High Voltage, Volume 11, Issue 2, Page 370-384, April 2026.ABSTRACT As the ‘main blood vessel’ of the traction power supply system for high‐speed trains, the ‘wheel‐rail’ coupling grounding reflux system provides the vital channel to send traction current back to terrestrial substations; meanwhile, the rail track also plays a role in transmitting the train's occupancy signal to the control system. An insulated
Jiefu Hou +9 more
wiley +1 more source
Hovering of coaxial Trirotor helicopter constructed with coaxial mechanism driven by a motor
Nihon Kikai Gakkai ronbunshu, 2014 This paper proposes a coaxial trirotor helicopter constructed with coaxial mechanism driven by one motor. There two types of trirotor unmanned aerial vehicles (UAVs) are existed.
Yoshihiro TAKITA +2 more
doaj +1 more source
Empirical measurements of small unmanned aerial vehicle co-axial rotor systems [PDF]
, 2011 Small unmanned aerial vehicles (SUAV) are beginning to dominate the area of intelligence, surveillance, target acquisition and reconnaissance (ISTAR) in forward operating battlefield scenarios.
Bell, Jonathon, Prior, Stephen D.
core
Advanced Energy and Sustainability Research, Volume 7, Issue 3, March 2026.Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira +4 more
wiley +1 more source
Aerodynamic Interaction Minimization in Coaxial Multirotors via Optimized Control Allocation
DronesCoaxial multirotors, characterized by overlapping rotors, represent a common solution to increasing payload capacity while maintaining a compact platform size.
Andrea Berra +2 more
doaj +1 more source
Helicopter tail rotor thrust and main rotor wake coupling in crosswind flight [PDF]
, 2010 The tail rotor of a helicopter with a single main rotor configuration can experience a significant reduction in thrust when the aircraft operates in crosswind flight. Brown’s vorticity transport model has been used to simulate a main rotor and tail rotor
Balch D. T. +9 more
core +1 more source
Advanced Intelligent Systems, Volume 8, Issue 3, March 2026.This review systematically analyzes deformable drones, including extendable, foldable, and tilting configurations, along with nature‐inspired flapping rotorcraft. By classifying deformation principles and structural mechanisms, design trade‐offs, functional capabilities, and future development potential are highlighted.
Ju‐Hee Lee +9 more
wiley +1 more source
Interactional aerodynamics and acoustics of a propeller-augmented compound coaxial helicopter [PDF]
, 2008 The aerodynamic and acoustic characteristics of a generic hingeless coaxial helicopter with a tail-mounted propulsor and stabiliser have been simulated using Brown's Vorticity Transport Model.
Brown, Richard +3 more
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