Results 11 to 20 of about 11,572,657 (308)
Ground Effect Aerodynamics of Race Cars [PDF]
Applied 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
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The effect of military load carriage on ground reaction forces [PDF]
, 2007 Load carriage is an inevitable part of military life both during training and operations. Loads carried are frequently as high as 60% bodyweight, and this increases injury risk. In the military, load is carried in a backpack (also referred to as a Bergen)
Haslam, Roger +5 more
core +6 more sources
Safety analysis of rotors in ground effect [PDF]
Aerospace Science and Technology, 2021 In this work, computational fluid dynamics was used to support safety analyses of rotors operating in ground effect. Initially, the research focused on the evaluation and prediction of the outwash generated by a hovering micro-rotor, and time-averaged outflow velocities were compared with experimental results. Then, using scaling factors, the simulated
Federico Rovere +2 more
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The Ground Effect in Anguilliform Swimming [PDF]
Biomimetics, 2020 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 self-propelled anguilliform swimmer are carried out—one swimming far away from the ground (free swimming) and the ...
Uchenna E. Ogunka +3 more
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Grounding as a Side‐Effect of Grounding [PDF]
Topics in Cognitive Science, 2018 AbstractIn relation to semantics, “grounding” has (at least) two relevant meanings. “Symbol grounding” is the process of connecting symbols (e.g., words) to perception and the world. “Communicative grounding” is the process of interactively adding to common ground in dialog. Strategies for grounding in human communication include, crucially, strategies
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Toward Hybrid CAA with Ground Effects [PDF]
International Journal of Aeroacoustics, 2014 CAA based on the Linearised Euler Equations (LEE) is applied to propagate aerodynamic sound over an extended distance including ground effects. The LEE are coupled to data from an LES via an acoustic analogy to follow-up the sound from the source to the extended far field: the complete chain is illustrated on the sound generated by a cylinder in a M ...
Jacob, Marc +4 more
openaire +5 more sources
On the origin of the ground effect
International Journal of Mechanical Engineering Education, 2023 The ground effect is well known to pilots and aerodynamicists alike. However, the current explanations found in undergraduate (and pilot-focused) textbooks can be inconsistent, often attributing the phenomena to the interaction between tip vortices at the ground.
Lisa Long, Jaime G Wong
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Diffraction assisted rough ground effect. [PDF]
The Journal of the Acoustical Society of America, 2010 Ground effect results from the interference between sound traveling directly from a point source to a receiver and that reflected coherently from the ground. The frequencies associated with first and subsequent order destructive interference in excess attenuation spectra are determined by the source-receiver geometry and the ground impedance. Typically
Bashir, Imran +3 more
openaire +2 more sources
Edge-region grouping in figure-ground organization and depth perception. [PDF]
, 2008 Edge-region grouping (ERG) is proposed as a unifying and previously unrecognized class of relational information that influences figure-ground organization and perceived depth across an edge. ERG occurs when the edge between two regions is differentially
Brooks, Joseph L, Palmer, Stephen E.
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Above- and below-ground competition in high and low irradiance: tree seedling responses to a competing liana Byttneria grandifolia [PDF]
, 2008 : In tropical forests, trees compete not only with other trees, but also with lianas, which may limit tree growth and regeneration. Liana effects may depend on the availability of above- and below-ground resources and differ between tree species.
Bongers, F +7 more
core +1 more source