To get full information or details of drag reduction system ppt please have a look on the pages

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http://seminarsprojects.net/Thread-drag-reduction-in-ships-using-microbubbles-technology-full-report?pid=33954&mode=threaded

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Alternative approaches to rear end drag reduction

Introduction

Aerodynamic drag of a commercial vehicle is a large part of the vehicles fuel consumption,
according to Hucho it can contribute to as much as 60 % of the vehicles fuel consumption.
So far aerodynamic design of commercial vehicles has concentrated on the front end of the
vehicle. Since it produces most drag it has been the most urgent part to optimise. This
optimisation can easily be spotted on trucks and tourist coaches. The rear end confi ....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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The vortex tube was discovered in 1930 by Georges Ranque, a French physics student, was experimenting with a vortex-type pump he had developed when he noticed warm air exhausting from one end, and cold air from the other. Ranque soon forgot about his pump and started a small firm to exploit the commercial potential for this strange device that produced hot and cold air with no moving parts. However, it soon failed and the vortex tube slipped into obscurity until 1945whenRudolphHilsch, a German physicist, published a widely read scientific paper ....etc

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Drag Reduction in Ships Using Micro bubbles Technology Abstract: Drag is a mechanical force which is generated with a solid object that is moving through a fluid. There should be movement between the object and the fluid. Drag acts in opposite direction to the direction of motion of the body.

When a body is moving then it experiences a drag force and it usually has two components, frictional drag which is called viscous drag and pressure drag which is called form drag or profile drag.

Frictional drag is generated with friction between th ....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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how do we find linear and quadratic drag coefficients of an rov mathematically (theoritically)? ....etc

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ABSTRACT

Vortex refrigeration is a highly sophisticated system that contains a vortex tube which due to centrifugal force expels the internal energy of the air while the air at the centre core is made cooler. In this type of system the effectiveness is too low but considering its small size this can t be ruled off. This is used as personal cooling system in suits that are designed to withstand heat.


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CHAPTER -I
INTRODUCTION
1.1 Refrigeration
*Refrigeration is the ....etc

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advantages and disadvantages of use of micro bubbles in ship ....etc

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To get full information or details of drag reduction by vortex generator please have a look on the pages

http://seminarsprojects.net/Thread-research-on-aerodynamic-drag-reduction-by-vortex-generators

http://seminarsprojects.net/Thread-vortex-generator-full-report?pid=28900#pid28900

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