Results 271 to 280 of about 443,866 (305)

Numerical Analysis of Laminar-Drag-Reducing Grooves

Journal of Fluids Engineering, 2015
The performance of grooves capable of reducing shear drag in laminar channel flow driven by a pressure gradient has been analyzed numerically. Only grooves with shapes that are easy to manufacture have been considered. Four classes of grooves have been studied: triangular grooves, trapezoidal grooves, rectangular grooves, and circular-segment grooves ...
A. Mohammadi, J. M. Floryan
openaire   +1 more source

Integrated analysis of drag embedment anchor installation

Ocean Engineering, 2014
Abstract During installation of drag embedment anchors (DEAs), the anchor, tensioned mooring line and anchor-handling vessel interact with each other and make up an integrated system. This paper presents an integrated quasi-static model for the anchor, line and vessel for use in simulating the installation of DEAs by moving vessels or stationary ...
Li-zhong Wang, Kan-min Shen, Ling-ling Li, Zhen Guo   +3 more
openaire   +1 more source

Analysis of polymer drag reduction mechanisms from energy budgets

International Journal of Heat and Fluid Flow, 2012
Abstract The transfer of energy in drag reducing viscoelastic flows is analyzed through a sequence of energetic budgets that include the mean and turbulent kinetic energy, and the mean polymeric energy and mean elastic potential energy. Within the context of single-point statistics, this provides a complete picture of the energy exchange between the ...
L. Thais, Thomas B. Gatski, Gilmar Mompean   +2 more
openaire   +1 more source

Quantitative analysis of Drag Reduction in Horizontal Slug Flow

All Days, 2000
Abstract Calculations have been done to predict the components of pressure drop in slug flow. This analysis is aimed to understand, in quantitative manner, the contributions of both frictional and accelerational components to total pressure drop in horizontal slug flow and the effect of DRA's on each component ...
M. Daas, C. Kang, W.P. Jepson
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Drag Analysis of a Supersonic Fighter Aircraft

2016
For aircraft design, drag optimization is very important for having better flight performance and less fuel consumption. In this study, drag effects of fuselage, wing and tail section are separately analyzed using a generic F-16 fighter aircraft model in ANSYS Fluent CFD tool with polyhedral mesh.
Kurtulus D. F., Golcuk A. I., Akgun O., Kaynak Ünver   +3 more
openaire   +2 more sources

Drag Prediction Workshop 4 Results Using Different Grids Including Near-Field/Far-Field Drag Analysis

Journal of Aircraft, 2013
CFS Engineering and RUAG Aviation participated in the 4th Drag Prediction Workshop organized by AIAA in June 2009. Calculations were made for the Common Research Model configuration using the Navier–Stokes multiblock solver on the grids generated at CFS Engineering.
Jan B. Vos, Stephane Sanchi, Alain Gehri
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Coastdown/Wind Tunnel Drag Correlation and Uncertainty Analysis

SAE Technical Paper Series, 2001
<div class="htmlview paragraph">This paper describes a program of coastdown and wind tunnel tests conducted with the objective of establishing a correlation between the aerodynamic drag force measured at the Lockheed-Martin Low-Speed Wind Tunnel (LSWT) and that inferred from coastdown results on the test track.
Joel A. Walter, David J. Pruess, Gary F. Romberg   +2 more
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TSTO Airbreathing Propulsion Analysis with Lift and Drag

12th AIAA International Space Planes and Hypersonic Systems and Technologies, 2003
Two-stage access-to-space vehicles with airbreathing first stages will initially use lift to counter weight on trajectories to orbit, and fight drag on their passage through the atmosphere. Second stages will use rocket propulsion at some point, though they may also begin with an airbreathing phase. This suggests that the first stage should be designed
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Auto-aerodynamic drag-force analysis

Experimental Mechanics, 1967
P. B. Hertz, P. R. Ukrainetz
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Predicting the Drag of Rough Surfaces

Annual Review of Fluid Mechanics, 2021
Daniel Chung, Nicholas Hutchins, Michael P Schultz   +2 more
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