Ground effect (cars)
View article: Characterization of the Aerodynamic Ground Effect and Its Influence in Multirotor Control
Characterization of the Aerodynamic Ground Effect and Its Influence in Multirotor Control Open
This paper analyzes the ground effect in multirotors, that is, the change in the thrust generated by the rotors when flying close to the ground due to the interaction of the rotor airflow with the ground surface. This effect is well known …
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CFD analysis of the aerodynamic effects on the stability of the flight of a quadcopter UAV in the proximity of walls and ground Open
Quadcopters are attracting a growing interest in many applications such as cargo delivery or surfaces inspection. These applications are often subjected to flights in the proximity of walls or ground that generate external forces and torqu…
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In-Ground-Effect Modeling and Nonlinear-Disturbance Observer for Multirotor Unmanned Aerial Vehicle Control Open
This paper focuses on modeling and control of in-ground-effect (IGE) on multirotor unmanned aerial vehicles (UAVs). As the vehicle flies and hovers over, around, or underneath obstacles, such as the ground, ceiling, and other features, the…
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Numerical-experimental evaluation and modelling of aerodynamic ground effect for small-scale tilted propellers at low Reynolds numbers Open
In recent years, aerial manipulators with fully-actuated capabilities are gaining popularity for being used in aerial manipulation operations such as critical infrastructure inspection or aerial manipulation tasks. Those scenarios usually …
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Aerodynamic Effect of the Gurney Flap on the Front Wing of a F1 Car and Flow Interactions with Car Components Open
The design of a racing car needs several aerodynamic design steps in order to achieve high performance. Each component has an aerodynamic interaction with the others and high performance requires a good match between them. The front wing i…
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Aerodynamics and flight mechanics analysis of Airbus Helicopters’ compound helicopter RACER in hover under crosswind conditions Open
In recent years, various helicopter manufacturers have been focusing increasingly on the development of new high-speed rotorcraft configurations, one of them being the compound helicopter RACER of Airbus Helicopters (AH). However, these ne…
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A dynamic analysis of ground effect for a quadrotor platform Open
It is well known in the literature on multirotor UAVs that the flight control performance is affected when operating close to the ground surface. While ground effect has been studied extensively for full scale helicopters, its study for mu…
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Aerodynamic performance and analysis of a hovering micro-scale shrouded rotor in confined environment Open
The aerodynamic characteristics of open rotor hovering in confined environment are extensively studied, but few papers focus on shrouded rotor. In order to study aerodynamic performance and flowfield characteristics of micro-scale shrouded…
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The Ground Effect in Anguilliform Swimming Open
Some anguilliform swimmers such as eels and lampreys swim near the ground, which has been hypothesized to have hydrodynamic benefits. To investigate whether swimming near ground has hydrodynamics benefits, two large-eddy simulations of a s…
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The Effects of Wheel Design on the Aerodynamic Drag of Passenger Vehicles Open
Approximately 25 % of a passenger vehicle’s aerodynamic drag comes directly or indirectly from its wheels, indicating that the rim geometry is highly relevant for increasing the vehicle’s overall energy efficiency. An extensive experimenta…
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Numerical investigation on unsteady characteristics of ducted fans in ground effect Open
Ducted fans are widely used in various applications of Unmanned Aerial Vehicles (UAVs) due to the high efficiency, low noise and high safety. The unsteady characteristics of ducted fans flying near the ground are significant, which may bri…
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Rolling and pitching oscillating foil propulsion in ground effect Open
In this paper, we investigate the effect of operating near a solid boundary on the forces produced by harmonically oscillating thrust-generating foils. A rolling and pitching foil was towed in a freshwater tank in a series of experiments w…
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Numerical study on aerodynamics of banked wing in ground effect Open
Unlike conventional airplane, a WIG craft experiences righting moment and adverse yaw moment in banked turning in ground effect. Numerical simulations are carried out to study the aerodynamics of banked wing in ground effect. Configuration…
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The Influence of Front Wing Pressure Distribution on Wheel Wake Aerodynamics of a F1 Car Open
The present study focuses on investigating the aerodynamic interaction between a three-element wing and wheel in ground effect, following the Formula One regulation change set for 2022, among which is the simplification of the front wing. …
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High-fidelity aerodynamic and acoustic design and analysis of a heavy-lift eVTOL Open
This work presents the high-fidelity aerodynamic and acoustic modelling processes supporting the preliminary design of a large eVTOL vehicle at the University of Glasgow in collaboration with GKN Aerospace. To support the GKN heavy-lift eV…
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Aerodynamics of MAV rotors in ground and corner effect Open
The work presented in this paper is part of a project called ARChEaN (Aerodynamic of Rotors in Confined ENvironment) whose objective is to study the interactions of a micro drone rotor with its surroundings in the case of flight in enclose…
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Aerodynamic analysis and control for a novel coaxial ducted fan aerial robot in ground effect Open
Modeling and control for a novel coaxial ducted fan aerial robot in-ground-effect is presented in this article. Based on experiments using the ducted fan bench test, the fitting curve of the ground effect thrust of the ducted fan aerial ro…
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Aerodynamic Characteristics of a Ducted Fan Hovering and Transition in Ground Effect Open
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 usi…
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Unsteady aerodynamic performance of a maglev train: the effect of the ground condition Open
The effect of ground condition on unsteady aerodynamic performance of a maglev train was numerically investigated with an IDDES (Improved Delayed Detached Eddy Simulation) method. The accuracy of the numerical method has been validated by …
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Quadrotor Drone Hovering in Ground Effect Open
A variable-pitch-controlled quadrotor drone was simulated in the ground effect using a high-fidelity CFD solver. In contrast to a single rotor in the ground effect, which has been extensively studied for conventional helicopters, the flow …
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Aerodynamic performance of hovering micro revolving wings in ground and ceiling effects at low Reynolds number Open
Numerous investigations have been conducted to understand the wall effects on rotors. The purpose of this study is to further investigate the aerodynamic performance of revolving wings, especially when it is very close to the ground and ce…
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Numerical investigation of full helicopter with and without the ground effect Open
In the present work, the aerodynamic performance of the full helicopter PSP in hover flight is investigated using a simplified concept of multiple reference frame (MRF) technique in the context of high-order Monotone Upstream Centred Schem…
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CFD analysis of the performance of different airfoils in ground effect Open
Ground effect is a phenomenon caused by the presence of a fixed boundary layer below the wing when it moves close to a fixed surface. This results in an effective increase in lift to drag ratio of the airfoil. In this paper, the performanc…
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An Analytical Model for Predicting Ground Pressure under a Rigid-Flexible Tracked Vehicle on Soft Ground Open
Ground pressure is a significant parameter for the mobility, tractive performance, and soil compaction. In this study, an analytical model for predicting ground pressure distribution under a rigid-flexible tracked vehicle on soft ground wa…
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A Simulation Framework for Aircraft Take-Off Considering Ground Effect Aerodynamics in Conceptual Design Open
The development of novel aircraft concepts and propulsion technologies requires up-to-date physics-based methods and tools for conceptual aircraft design. In this context, a simulation model for the take-off manoeuvre is proposed in this a…
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A Moore-Greitzer Model for Ducted Fans in Ground Effect Open
Ducted fans are widely used in unmanned aerial vehicles due to their high propulsive efficiency and safety. The aerodynamics are complex within the vicinity of the ground, including take-off, landing and hovering. In the present study, the…
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Aerodynamic characteristics of a delta wing aircraft under ground effect Open
The main objective of this study is to investigate the impact of ground effects on the aerodynamic coefficients of a delta wing aircraft model. Since the flow on the delta wing exhibits vortical flow inherently, it is crucial to examine th…
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Hovering rotor aerodynamics in extreme ground effect Open
This paper presents an experimental and numerical study of the aerodynamics of a moderate-scale rotor hovering in the Extreme Ground Effect (EGE) where rotor height-off-ground is below half the rotor radius. The tip vortex field was visual…
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Review of experimental investigations of wings in ground effect at low Reynolds numbers Open
The ground effect-induced large lift increase and lift-induced drag reduction have long been recognized and utilized in the design and construction of wing-in-ground effect (WIG) craft. Various wing planforms have been employed in WIG craf…
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Airfoil Aerodynamics in Proximity to Wavy Ground for a Wide Range of Angles of Attack Open
Wing-in-ground craft often encounter waves when flying over the sea surface, and the ground effect is more complicated than that of flat ground. Therefore, the aerodynamic characteristics of the NACA 4412 airfoil in proximity to wavy groun…