ABSTRACT
Four simple, low cost aerodynamic drag reduction devices have been developed for application to
the trailer of a tractor-trailer truck. Two vortex flow devices have undergone extensive
operational fleet testing where they have amassed over 85,000 miles of use. These two vortex
flow technologies have shown a combined fuel savings of 8% at an average speed of 47.5 mph.
This improvement in fuel economy correlates to an equivalent drag reduction of approximately
20% with a corresponding drag coefficient of 0.45. Observations ....etc

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Research on Aerodynamic Drag Reduction by Vortex Generators




Introduction

To save energy and to protect the global environment,
fuel consumption reduction is primary concern of
automotive development. In vehicle body development,
reduction of drag is essential for improving fuel
consumption and driving performance, and if an aerodynamically
refined body is also aesthetically attractive,
it will contribute much to increase the vehicle’s appeal
to p ....etc

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1. INTRODUCTION
Drag is a mechanical force generated by a solid object moving through a fluid. For drag to be generated, the solid body must be in contact with the fluid. If there is no fluid, there is no drag. Drag is generated by the difference in velocity between the solid object and the fluid. There must be motion between the object and the fluid. If there is no motion, there is no drag. Drag acts in the direction opposite to the direction of motion of the body.
A body moving through a fluid experiences a ....etc

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Combined aerodynamic and electrostatic atomization of dielectric
liquid jets




Abstract

The electrical and atomization performance of a
plane–plane charge injection atomizer using a dielectric
liquid, and operating at pump pressures ranging from 15 to
35 bar corresponding to injection velocities of up to 50 m/s,
is explored via low current electrical measurements, spray
imaging and phase Doppler anemometry. The work is
aimed at understanding the contribution of electrostatic
charging relevant t ....etc

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ABSTRACT
This paper presents results of numeric modeling of three-dimensional flow around the configuration of the piloted orbital spaceship “the winged aerospace vehicle proposed by the central Hydrodynamic Institute.The flight vehicle with nondeflected control devices was examined.The effect of the deflection of the balancing flap on the flow field and the aerodynamic performance of the vehicle is studied here.The efficiency of the flap with its deflection is obtained.Computations were perfomed using the applied p ....etc

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Numerical Simulation for Aerodynamic Characteristics of Low Altitude and Subsonic Flight Vehicle
Abstract—In order to analyze the drag characteristics of the vehicle having different war head and empennage, the computational fluid dynamics numerical simulation was used. The method was based on fully hexahedral mesh and three-dimensional Navier-Stokes equations and Spalart-Allmaras turbulence model. Through numerical simulation the flow field structures and computational aerodynamic characteristics were obtained. T ....etc

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how do we find linear and quadratic drag coefficients of an rov mathematically (theoritically)?
....etc

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ABSTRACT
Drag is a mechanical force generated by a solid object moving through a fluid. For drag to be generated, the solid body must be in contact with the fluid. Drag is generated by the difference in velocity between the solid object and the fluid. Drag acts in the direction opposite to the direction of motion of the body.
Microbubbles is a drag reduction device that reduces skin friction of a solid body moving in water by injecting small bubbles into the turbulent boundary layer developing on the s ....etc

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Aerodynamic Cooling of Automobiles



INTRODUCTION


The air that rams into the engine bay, is used for cooling, combustion, and for passengers, then reaccelerated by a nozzle and then ejected under the floor.
 

Most car designs have had thousands of pounds spent on them and many hours in the wind tunnel while the engineers refined and altered, tested and assessed to achieve their goals. But contrary to popular belief, many of those hours weren’t used ....etc

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Dear Sir,


I want to give seminar on distribution coefficient so I want to see your ppt for presentation. ....etc

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