Ways to Reduce Aerodynamic Drag in Vehicles

Assessment (Modelling Aerodynamic)

Table of Contents
INTRODUCTION...........................................................................................................................1
MAIN BODY...................................................................................................................................1
MATLAB Program......................................................................................................................3
Ways to reduce Drag....................................................................................................................5
CONCLUSION................................................................................................................................5
REFERENCES................................................................................................................................7

INTRODUCTION
Aerodynamic drag is considered as a force that acts against the relative motion of the a
object respect to surrounding fluid. This also can be considered as resistance between two
different fluids or resistance between a fluid and a solid surface. This resistance between surfaces
reduce the fuel efficiency of the vehicle (Ageev and Pavlenko, 2016). Fuel efficiency is one of
the major concern in current time that is considered by engineers to maintain the sustainability of
the motor vehicles by making such changes in the structural design of vehicles. Some techniques
that can be used to reduce the aerodynamic drag in different vehicles also will be provided in the
report. The major purpose of this process to evaluate the energy loss in the vehicles due to drag
in order investigate various methods that can be used to analyse energy require to overcome the
aerodynamic drag. The processes that can be used to calculate fuel consumption due to drag will
be explained in the report. Some of required to be made in assumptions
MAIN BODY
Aerodynamic Drag is a mechanical force on the object that resist the motion through the
fluid called drag and if fluid is gas like air called aerodynamic and if fluid is water it is
hydrodynamic. Which are induced interaction between solid and fluid like gas and liquid. Drag is
generate through the difference of velocity, if the velocity of the solid and fluid are different drag
is occurs (Aschwanden and Gopalswamy, 2019). Drag is act in the direction of opposite of object
motion. Drag aerodynamic is one type of force so it is a vector quantity so that having both
magnitude and direction. The aero dynamic drag force depend upon the various factor like
density of the fluid (Air / liquid, cross section area which are direction of the motion, velocity,
and aero dynamic coefficient.
Drag reduction using rear screen : In this method certain installation like the plate (Rear
screen) is placed at back of the vehicle. By this rear screen air separation is create at the end wall
of the vehicle. By this rear screen the vortex is generate between the rear screen and end wall of
the vehicle. The generation n of vortex reduce the air separation (Merkes, Menaspà and Abbiss,
2019). By this method the drag aerodynamic is reduced and if increase the distance between rear
screen and rear wall of the vehicle we got a better result.
Drag reduction using rear fairing : Rear fairing is addition extended structure at air separation
area in vehicle. The extended structure make perfect no air separation. The full size of rear
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