Results 11 to 20 of about 587,209 (299)
Applied Sciences, 2021 To ensure the stability of flight, the butterfly needs to flap its wings and simultaneously move its main body to achieve all kinds of flying motion, such as taking off, hovering, or reverse flight.
Yixin Zhang +4 more
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Wind Tunnel Investigation of the Icing of a Drone Rotor in Forward Flight
DronesThe Bell Textron APT70 is a UAV concept developed for last mile delivery and other usual applications. It performs vertical takeoff and transition into aircraft mode for forward flight. It includes four rotor each with four rotating blades.
Derek Harvey +3 more
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Power Modeling and Experiment Study of Large Flapping-Wing Flying Robot during Forward Flight
Applied Sciences, 2022 A power estimation approach for calculating the power of a flapping-wing air vehicle (FWAV) in forward flight is proposed in this paper. One of the challenges and essential points of FWAVs is endurance.
Siping Zhong, Wenfu Xu
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Animal Behavior: Fly Flight Moves Forward [PDF]
Current Biology, 2013 A new study has resolved the paradox of how flies maintain reflexive aversion to your approaching swatter, whilst tolerating similar visual signals during normal forward flight.
Fox, Jessica L., Frye, Mark
openaire +2 more sources
Wake Propagation and Characteristics of a Multi-Rotor Unmanned Vehicle in Forward Flight
Drones, 2022 In this study, experimental investigations are used to explore the wake propagation and characteristics of a multi-rotor unmanned air vehicle (UAV) in a forward flight mission.
Glen Throneberry +4 more
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Comparative Study of Coaxial Main Rotor Aerodynamics at Forward Flight Based on Free Wake Model and Unsteady ReynoldsAveraged Navier–Stokes Method [PDF]
Journal of Aerospace Technology and Management, 2022 This paper is dedicated to the numerical modeling of the aerodynamic characteristics of the full-scale coaxial main rotor. The modes of forward flight in the range of values V = 30−60 m∙s–1 (108−216 km∙h–1) have been under consideration.
Sergey Gennadievich Konstantinov +4 more
doaj +1 more source
Applied Sciences, 2023 The aerodynamic interaction between the rotor and fuselage is an important consideration in relation to the drag performance prediction of helicopters. In this paper, based on dynamic patched-grid technology coupled with a three-dimensional N–S equation ...
Wenbo Shi, Heng Zhang, Yuanxiang Li
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Experimental Investigations on Flow Control of the Rotor via the Synthetic Jets in Forward Flight
Aerospace, 2023 To study the effects of synthetic jet control on the aerodynamic performance of a rotor in forward flight, we conducted a series of experiments with varying rotor rotation speeds and free stream velocities.
Xi Chen +3 more
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A Resilient Forward-Looking Terrain Avoidance Warning Method for Helicopters
Aerospace, 2022 To reduce nuisance alarms caused by a fixed forward-looking boundary, this paper proposes a resilient forward-looking terrain avoidance method. The method constructed the resilient and adjustable forward-looking boundary model by using roll angle and ...
Rui Chen, Long Zhao
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Modelling the helicopter rotor aerodynamics at forward flight with free wake model and URANS method
Aviation, 2020 The presented work is dedicated to the numerical study of the aerodynamic characteristics of the helicopter rotor. Two approaches to modeling of the rotor are applied: the free wake model developed by the Authors with using steady airfoil characteristics
Yuri Ignatkin +3 more
doaj +1 more source