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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 ...
Comparative Study of 3D Wing Drag Minimization by Different Optimization Techniques
3D Wing Drag Minimization Diff erent Optimization Techniques
2015/7/2
The main goal of this paper is to document a comparative study of different CFD based optimization techniques applied to the so lution of a 3D wing drag minimization problem.
Bodies having Minimum Pressure Drag in Supersonic Flow-Investigating Nonlinear Effects
Minimum Pressure Drag Supersonic Flow-Investigating Nonlinear Eff ects
2015/7/2
One of the most interesting problems in supersonic aerodynamics has been to find profile shapes that have minimum pressure drag, subject to a set of geometric constraints.Considerable work...
An Analysis of Bodies Having Minimum Pressure Drag in Supersonic Flow: Exploring the Nonlinear Domain
Analysis Bodies Having Minimum Pressure Drag Supersonic Flow Exploring Nonlinear Domain
2015/7/2
One of the most interesting problems in supersonic aerodynamics has been to nd pro le shapes that have minimum pressure drag, subject to a set of geometric constraints. Considerable work was done in ...
Out of a host of experimental aerodynamic data available for the DLR-F6 configura tion a set of reference test cases has been chosen for the second AIAA drag prediction workshop.
Automatic Design of Transonic Airfoils to Reduce Reduce the Shock Induced Pressure Drag
Automatic Design Transonic Airfoils Shock Induced Pressure Drag
2015/7/1
This paper discusses the use of control theory for optimum design of aerodynamic configurations. Examples are presented of the application of this msethod to the reduction of shock induced press...
Supersonic Aircraft Optimization for Minimizing Drag and Sonic Boom
Sonic Boom Minimizing Drag
2015/6/18
A design tool incorporating classical sonic boom theory, computational fluid dynamics
and a multi-objective genetic algorithm was developed for low-boom supersonic aircraft
optimization. Both sonic ...
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.
Drag force on a sphere moving towards an anisotropic super-hydrophobic plane
Drag force sphere super-hydrophobic
2011/8/26
We analyze theoretically a high-speed drainage of liquid films squeezed between a hydrophilic sphere and a textured super-hydrophobic plane, that contains trapped gas bubbles. A superhydrophobic wall ...
Drag Coefficient of a Spherical Particle Attached on the Flat Surface
Drag coefficient Boundary layer Numerical simulation Reynolds number
2016/3/28
The previous analytical solution for the drag coefficient (Cd) for a spherical particle attached on the flat surface, which
was derived by O’Neill (1968), is only valid in the creeping flow condition...
Drag on a fluid sphere embedded in a porous medium
Brinkman equation Modified Bessel functions Drag force
2010/9/26
The problem of the Stokes flow past a fluid sphere embedded in a porous medium is studied. The Brinkman equation for the flow outside the fluid sphere and the Stokes equation for inside the fluid sphe...
Experimental Research and Mathematical Model of Drag Torque in Single-plate Wet Clutch
wet clutches drag torque mathematical model laminar flow
2011/8/3
Reduction of drag torque is one of important potentials to improve transmission efficiency. Existing mathematical model of drag torque was not accurate to predict the decrease after oil film shrinking...
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...