Results 221 to 230 of about 19,940 (264)

General expression of aerodynamic force under different boundary conditions (slip, partial slip, no-slip)

Physics of Fluids, 2021
Integral expression is derived for aerodynamic forces in unsteady separated flows of an incompressible Newtonian fluid via the characteristics of the flow on the body surface including the vortex flux generated by it. The expression obtained is valid for unsteady and steady flows under the no-slip or the partial slip boundary conditions in a viscous ...
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Wall suction & slip effect of spherical-grooved bionic metasurface for controlling the aerodynamic noise

Applied Acoustics, 2021
Abstract The wall suction & slip effect of the bionic metasurface with periodic spherical grooves on the vehicle body surface is proposed for aerodynamic noise control, and physical mechanism is investigated by theoretical analysis and simulation. When fluid flows through the grooved vehicle body surface, wall suction effect occurs due to clockwise ...
Min Li, Jiu Hui Wu, Xiao Yang Yuan
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The Aerodynamic Characteristics of a WRC Rally Car at High Slip Angles

SAE Technical Paper Series, 2004
<div class="htmlview paragraph">Rally cars are frequently operated at high speeds on loose road surfaces and significant slip angles are achieved when cornering. A wind tunnel test procedure is presented which allows those slip angles to be accommodated whilst maintaining contact between the tires and the wind tunnel's moving ground plane.
R. G. Dominy, S. Richardson
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Aerodynamic analysis of a biradial turbine with movable guide-vanes: Incidence and slip effects on efficiency

Energy, 2020
Abstract The paper presents a numerical study on the aerodynamics of a biradial turbine for wave energy conversion. The turbine is symmetrical with respect to a plane perpendicular to its axis of rotation. The two inlet/outlet rotor openings are axially offset from each other facing the radial direction and two rows of radial-flow movable guide-vanes
D.N. Ferreira, L.M.C. Gato, L. Eça, J.C.C. Henriques   +3 more
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Aerodynamic Heating of Simple Geometries in the Slip - and Intermediate - Flow Regimes

Journal of the Aerospace Sciences, 1959
It was shown rather conclusively in reference 2 that , for a given Mach Number M, taper ratio X, and span-to-body-diameter ratio b/D, CNTU is a function of / only, independent of the number of fins. The purpose of the present note is to point out that this correlation can be made independent of Mach Number also, by the simple expedient of plotting ...
Barry L. Reeves, William M. Van Camp
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The effect of Maxwell slip on the aerodynamic collision and rebound of spherical particles

Journal of Colloid and Interface Science, 1988
Abstract A theoretical model is developed which predicts the relative velocity as a function of the gap distance between two small spheres colliding in a fluid. In lieu of the conventional no-slip fluid boundary conditions, a Maxwell slip-flow approximation is employed when the distance between the particles reduces to the same order of magnitude as ...
Guy Barnocky, Robert H Davis
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Aerodynamic films between carbon brushes and slip-rings

Wear, 1962
Experiments have been made to determine the conditions under which air films are formed between electrographite brushes and slip-rings. It is shown that aerodynamic pressures both above and below atmospheric can exist when the brush is inclined to the slip-ring at angles between 1.10−3 and 5.10−2 rad.
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Experimental investigation of waverier aerodynamic forces in supersonic and hypersonic slip regime

2022
This paper presents an experimental investigation focused on aerodynamic forces of a waverider in supersonic and hypersonic slip regime. This study is carried out in the laboratory ICARE of CNRS with the wind tunnel named MARHy. This facility recreates supersonic and hypersonic rarefied flows thanks to different nozzles and a pumping unit able to ...
Lago, Viviana, Hugo, Noubel, Baranger, Céline   +2 more
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Investigation on pressure drop evolution of fibrous filter operating in aerodynamic slip regime under continuous loading of sub-micron aerosols

Separation and Purification Technology, 2008
Abstract The aim of this study is to experimentally investigate pressure drop and filtration efficiency of fibrous filters operating in aerodynamic slip regime under continuous loading of sub-micron aerosols. Test aerosol is sodium chloride (NaCl) particulates with electrical mobility diameter (EMD) ranging from 41 to 514 nm generated from ...
Wallace Woon-Fong Leung, Chi-Ho Hung
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Prediction of Pressure Drop & Aerodynamic Slip Velocity in the Established Zone in the Pneumatic Conveyance of Solids in the Horizontal Conduit

Indian Chemical Engineer, 2010
Abstract An expression for the pressure drop for the established zone of pneumatic conveying system has been derived by equating the gravitational force to the resistances offered to a particle moving with terminal settling velocity. The ratio of calculated and experimental pressure drop has been defined as K, which has been correlated in terms of ...
Satya Narayan, Om Prakash
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