Results 21 to 30 of about 3,858,029 (303)

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

Energy Consumption Performance of a VTOL UAV In and Out of Ground Effect by Flight Test

open access: yesDrones
Current research on ground-effect unmanned aerial vehicles (UAVs) predominantly centers on numerical aerodynamic optimization and stability analysis in the ground effect, leaving a significant gap in the thorough examination of flight performance through
Shanfei Su   +3 more
doaj   +1 more source

Numerical Simulation on Aerodynamics of Multi-Element Airfoil with Drooped Spoiler in Ground Effect

open access: yesXibei Gongye Daxue Xuebao, 2019
By using the finite volume method and k-ω SST turbulence model to solve the Reynolds Average Navier-Stokes equation and using the slipping wall to simulate the relative movement of the ground, the ground effect on the aerodynamic characteristic of multi ...

doaj   +1 more source

Ground Effect Aerodynamics of Race Cars [PDF]

open access: yesApplied Mechanics Reviews, 2006
We review the progress made during the last 30years on ground effect aerodynamics associated with race cars, in particular open wheel race cars. Ground effect aerodynamics of race cars is concerned with generating downforce, principally via low pressure on the surfaces nearest to the ground.
Zhang, Xin   +2 more
openaire   +3 more sources

RF Propagation Analysis of MICAz Motes Antenna with Ground Effect

open access: yes, 2012
In this paper we analyzed the Radio Frequency (RF) propagation characteristics of monopole antenna in MICAz mote. During the experimental analysis, two scenarios are considered.
Ahmed, Syed Hassan   +3 more
core   +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

The effect of screening long-range Coulomb interactions on the metallic behavior in two-dimensional hole systems

open access: yes, 2008
We have developed a technique utilizing a double quantum well heterostructure that allows us to study the effect of a nearby ground-plane on the metallic behavior in a GaAs two-dimensional hole system (2DHS) in a single sample and measurement cool-down ...
A. P. Micolich   +10 more
core   +1 more source

Structural and physico-mechanical properties of natural rubber/GTR composites devulcanized by microwaves: influence of GTR source and irradiation time [PDF]

open access: yes, 2018
Ground tire rubber from car and truck was modified using microwave irradiation at variable time. The irradiated ground tire rubber was used as filler in composites based on natural rubber.
Cañavate Ávila, Francisco Javier   +4 more
core   +2 more sources

Comparative computational analysis of NATO 5.56 mm, APM2 7.62 mm and AK-47 7.82 mm bullet moving at Mach 2.0 in close vicinity to the wall [PDF]

open access: yesFME Transactions, 2023
Comparative Computational Analysis of NATO 5.56 mm, APM2 7.62 mm and AK-47 7.82 mm Bullet Moving at Mach 2.0 in Close Vicinity to the Wall Various rifles require unique bullets. Each bullet has its capability, speed, and impact on the target.
Salunke Samruddhi   +3 more
doaj  

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