Results 31 to 40 of about 765,164 (366)

A rational method to evaluate tornado-borne missile speed in nuclear power plants (Validation of a numerical code based on Fujita's tornado model)

open access: yesNihon Kikai Gakkai ronbunshu, 2015
Explanation is given about a rational method to evaluate tornado-borne missile speed, flight distance and flight height to be used for safety design of a nuclear power plant.
Yuzuru EGUCHI   +3 more
doaj   +1 more source

Numerical Study on Airfoil Aerodynamics in Proximity to Wavy Water Surface for Various Amplitudes

open access: yesApplied Sciences, 2021
Wing–in–ground crafts will face waves with different amplitudes when flying over the ocean, and the high amplitude situations are especially lack of exploration.
Xing’an Liu   +4 more
doaj   +1 more source

Model, Control, and Realistic Visual 3D Simulation of VTOL Fixed-Wing Transition Flight Considering Ground Effect

open access: yesDrones, 2023
The research topic of VTOL (vertical take-off and landing) fixed wing (VFW) is gaining significant attention, particularly in the transition phase from VTOL to fixed wing and vice versa. One of the latest and most challenging transition strategies is the
Erwhin Irmawan   +2 more
doaj   +1 more source

A numerical study on the unsteady aerodynamic behaviour in close ground proximity of a Formula 1 style underbody [PDF]

open access: yes, 2023
openLo studio investiga le capacità di generazione di downforce di un sottoscocca in stile Formula One 2022 posizionato vicino a una superficie mobile e sottoposto a un movimento oscillatorio puro di spinta verticale.
PELLIZZARI, LUCA
core  

Ground Effect in Fruit Fly Hovering: A Three-Dimensional Computational Study

open access: yesJournal of Biomechanical Science and Engineering, 2013
In very few studies it is shown that an increase in vertical force can be achieved when a flapping-wing hovers in ground effect (IGE). The body, however, has usually been neglected and its influence on three-dimensional vortex structures and consequent ...
Masateru MAEDA, Hao LIU
doaj   +1 more source

Lifting-Line Predictions for Optimal Dihedral Distributions in Ground Effect

open access: yesApplied Sciences
When a flying wing comes within close proximity to the ground, a phenomenon called ground effect occurs where the lift is increased and the induced drag is decreased. This research seeks to determine the optimal dihedral distribution predicted by lifting-
Amanda K. Olsen   +2 more
doaj   +1 more source

Ground Effect Influence on UAV Propeller Thrust: Experimental and CFD Validation

open access: yesTechnologies
This work investigates the influence of ground effect on the performance of a UAV propeller through a combined experimental, analytical, and numerical approach.
Mădălin Dombrovschi   +4 more
doaj   +1 more source

Aerodynamic Characteristics of a Ducted Fan Hovering and Transition in Ground Effect

open access: yesAerospace, 2022
Ducted fans installed on vertical takeoff and landing vehicles experience significant ground effect during takeoff and landing. The aerodynamic characteristics of a ducted fan hovering and transitioning in the ground effect are studied using numerical ...
Yanxiong Zhao, Yun Tian, Zhiqiang Wan
doaj   +1 more source

Ground-State versus Transition-State Effects on the α-Effect as Expressed by Solvent Effects [PDF]

open access: yes, 2016
Ground-State versus Transition-State Effects on the α-Effect as Expressed by Solvent ...
Erwin Buncel (1695721)   +1 more
core   +1 more source

SiGe process integrated on-chip dipole antenna on finite size ground plane [PDF]

open access: yes, 2013
This letter investigates the effect of a finite-size ground plane on the radiation pattern and reflection coefficient of a SiGe process integrated on-chip antenna.
Seyyedesfahlan, Mirmehdi   +3 more
core   +1 more source

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