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Finding Computationally Inexpensive Methods to Model the Flow Past Heavy Vehicles and the Design of Active Flow Control Systems for Drag Reduction
Finding Computationally Inexpensive Methods Model Flow Past Heavy Vehicles Active Flow Control Systems Drag Reduction
2015/7/6
This paper explores the use of computational tools to analyze the aerodynamic e ects that Coanda jets have on the drag, stability and maneuverability of heavy vehicles. To facilitate the analysis and ...
Vortex suppression and drag reduction in the wake of counter-rotating cylinders
drag reduction instability control vortex interactions
2015/7/3
The flow over a pair of counter-rotating cylinders is investigated numerically and experimentally. It is demonstrated that it is possible to suppress unsteady vortex shedding for gap sizes from ...
Investigation on a new method of adaptive drag reduction and nonablation thermal protection system for hypersonic vehicles
hypersonic drag reduction heat flux jet aerospike numerical simulation
2013/9/2
A new adaptive drag reduction and nonablation thermal protection method named Telescopic Selfaligning JetSpike (TSAJS) is proposed to improve the conventional spiked method employed in hypersonic v...
Polymer Maximum Drag Reduction: A Unique Transitional State
Polymer Maximum Drag Transitional State
2011/9/5
The upper bound of polymer drag reduction is identified as a unique transitional state between laminar and turbulent flow corresponding to the onset of the nonlinear breakdown of flow instabilities.
The influences of wall Lorentz force and field Lorentz force on the cylinder drag reduction
Cylinder wake Flow control Lorentz force Electromagnetic control
2012/2/29
In this paper, the effects of Lorentz force on drag reduction for a circular cylinder have been studied experimentally and numerically. Based on its effects on drag reduction, the Lorentz force is fou...
A method for testing drag-reduction on riblet surfaces based on the Spalding formula
Spalding formula riblet surface drag-reduction testing
2011/9/13
This paper presents a method based on the Spalding formula for testing drag-reduction on riblet surfaces. Its advantage lies in that it is more convenient and yields more precise data compared with te...
Frictional Drag Reduction by the Nonlinear Effect of an Unsteady Boundary Layer
Drag Reduction Additional Pressure Gradient Apparent Friction Force Skin Friction Flat Plate Unsteady Boundary Layer
2009/5/12
An unsteady boundary layer past an elastic flat plate with a leading fixed edge and a surging trailing edge was investigated utilizing both numerical and analytical methods. Analytical solutions for l...
Experimental Study on Scale Effect of Drag Reduction by Microbubbles Using Very Large Flat Plate Ships
Microbubbles Scale Effect Frictional Drag Reduction Very Large Plate Ship
2009/5/12
Using flat plate ships of up to 50m in length in a 400m-long towing tank, we carried out experiments on the scale effect of microbubbles, the aim being to apply microbubbles to full-scale ships. The s...