Perspectives of Hydrodynamic Drag Reduction Methods

2001 ◽  
Vol 28 (4) ◽  
pp. 16
Author(s):  
Yu. N. Savchenko
Keyword(s):  
Drag Reduction ◽  
Hydrodynamic Drag ◽  
Reduction Methods

Electrochemical methods in the study of the hydrodynamic drag reduction by high polymer additives

1975 ◽  
Vol 20 (11) ◽  
pp. 909-911 ◽  
Author(s):  
C. Deslouis ◽  
I. Epelboin ◽  
B. Tribollet ◽  
L. Viet
Keyword(s):  
Drag Reduction ◽  
Electrochemical Methods ◽  
Hydrodynamic Drag ◽  
Polymer Additives ◽  
High Polymer

scholarly journals Smoother Than Smooth: Increasing the Flow Conveyance of an Open-Channel Flow by Using Drag Reduction Methods

2019 ◽  
Vol 145 (4) ◽  
pp. 04019011
Author(s):  
Emmanuel Mignot ◽  
Nicolas Riviere ◽  
Arnaud Lefevre ◽  
Bernard Quillien
Keyword(s):  
Drag Reduction ◽  
Channel Flow ◽  
Open Channel ◽  
Open Channel Flow ◽  
Reduction Methods

An experimental investigation into the hydrodynamic drag reduction of a flat plate using air-fed cavities

2014 ◽  
Vol 76 ◽  
pp. 105-120 ◽  
Author(s):  
A. Slyozkin ◽  
M. Atlar ◽  
R. Sampson ◽  
K.-C. Seo
Keyword(s):  
Experimental Investigation ◽  
Drag Reduction ◽  
Flat Plate ◽  
Hydrodynamic Drag

Microstructured Hydrophobic Skin for Hydrodynamic Drag Reduction

AIAA Journal ◽  
2004 ◽  
Vol 42 (2) ◽  
pp. 411-414 ◽  
Author(s):  
Ashwin K. Balasubramanian ◽  
Adam C. Miller ◽  
Othon K. Rediniotis
Keyword(s):  
Drag Reduction ◽  
Hydrodynamic Drag

scholarly journals Numerical Simulation of Supersonic Carman Curve Bodies with Aerospike

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
HaiLong Zhao ◽  
Ke Peng ◽  
ZePing Wu ◽  
WeiHua Zhang ◽  
JiaWei Yang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Mach Number ◽  
Supersonic Flow ◽  
Drag Reduction ◽  
Numerical Simulations ◽  
Reduction Methods ◽  
Reduction Effect ◽  
Supersonic Vehicles

Drag reduction is one of the important problems for the supersonic vehicles. As one of the drag reduction methods, aerospike has been used in some equipment because of its good drag reduction effect. In this paper, the numerical simulations of Carman curve bodies with different lengths of the aerospike and different radius of the flat cylindrical aerodisk in supersonic flow freestream are investigated. Based on the numerical simulations, the mechanism of drag reduction of the aerospike is discussed. The drag reduction effect influence of the parameters of the aerodisk radius and the aerospike length on the Carman curve body is analyzed. The aerodisk radius within a certain range is helpful for the drag reduction. The change of length of the aerospike has little effect on the drag of Carmen curve bodies. The drag reduction effect of the same aerospike becomes worse with the increase of the incoming Mach number.

Biomimetic Nanostructure Skin For Hydrodynamic Drag Reduction

2003 ◽  
Author(s):  
Adam Miller ◽  
Ashwin Balasubramanian ◽  
Othon Rediniotis ◽  
Lance Traub
Keyword(s):  
Drag Reduction ◽  
Hydrodynamic Drag

scholarly journals Boxfish swimming paradox resolved: forces by the flow of water around the body promote manoeuvrability

2015 ◽  
Vol 12 (103) ◽  
pp. 20141146 ◽  
Author(s):  
S. Van Wassenbergh ◽  
K. van Manen ◽  
T. A. Marcroft ◽  
M. E. Alfaro ◽  
E. J. Stamhuis
Keyword(s):  
Drag Reduction ◽  
High Performance ◽  
Flow Direction ◽  
Current Theory ◽  
The Body ◽  
Hydrodynamic Drag ◽  
Aerodynamic Design ◽  
Computational Fluid Dynamics Simulations ◽  
Dynamics Simulations

The shape of the carapace protecting the body of boxfishes has been attributed an important hydrodynamic role in drag reduction and in providing automatic, flow-direction realignment and is therefore used in bioinspired design of cars. However, tight swimming-course stabilization is paradoxical given the frequent, high-performance manoeuvring that boxfishes display in their spatially complex, coral reef territories. Here, by performing flow-tank measurements of hydrodynamic drag and yaw moments together with computational fluid dynamics simulations, we reverse several assumptions about the hydrodynamic role of the boxfish carapace. Firstly, despite serving as a model system in aerodynamic design, drag-reduction performance was relatively low compared with more generalized fish morphologies. Secondly, the current theory of course stabilization owing to flow over the boxfish carapace was rejected, as destabilizing moments were found consistently. This solves the boxfish swimming paradox: destabilizing moments enhance manoeuvrability, which is in accordance with the ecological demands for efficient turning and tilting.

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