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1. PRESIDENCY UNIVERSITY
GROUP - 3
SHREYAS NC - 20211LME0013
MATHEW.L - 20211LME0014
KIRAN - 0211LME0015
YESHWANTH.S - 20211LME0016
ROHITH HM - 20211LME0017
MENTOR : DR,DEVENDRA DANDOTIYA SIR
PPT Presentation
information on a method that has been developed to reduce
the drag on the tractor trailer

2. INDEX
Information Based on Reducing the Drag On the Tractor
Trailers
What is CRF
Methods of reducing drag on Tractor Trailers
How Can Drag Co-efficient be reduced
Types of tractor trailers
Drag reduction of a tractor trailer using guide vanes
Bibliography

3. WHAT IS CRF ( CAB ROOF FARING )
For a tractor-trailer driving on a highway, the front part of the
vehicle causes approximately 45% of the total drag force; the other
contributing factors include the rear wake of the trailer (25%) and
the underbody flow (30%)
Corresponding research was carried out at different positions, and
various kinds of drag-reducing devices have been introduced to
effectively decrease the aerodynamic drag of tractor-trailers,
including their cab roofs or gap

4. METHODS OF REDUCING DRAG ON
TRACTOR TRAILERS
Extending the skirts over the trailer wheels provides an additional
reduction in drag, as identified by the increased performance of the
extended side skirts over the standard side skirts.”
The gap between the back of the tractor and the front of the trailer is
one of the worst low-pressure areas on a tractor-trailer. Given the
articulation demands required of a fifth wheel, and the room for
trailer clearance required to meet those demands, it remains one of
the most difficult areas to address aerodynamically.

5. HOW CAN DRAG COEFFICIENT
BE REDUCED ?
Methods of decreasing the drag coefficient of a vehicle include re-
shaping the rear end, covering the underside of the vehicles, and
reducing the amount of protrusions on the surface of the car.
In order to decrease the aerodynamic drag on a vehicle, the sources
of drag must be analyzed. As mentioned previously, aerodynamic
drag is the force that opposes the direction of thrust of a car and is
not a desirable force. Given a set of vehicle conditions, the drag
force can be calculated
. The process of reducing the drag coefficient of a vehicle by
altering the vehicle shape is called streamlining [4]. It was
determined during the middle of the 20th century that the most
streamlined shape is a teardrop

6. WHAT KIND OF TRACTOR
TRAILERS ARE THERE?
Flatbed Trailers....
Step Deck or Drop Deck Trailers. ...
Lowboy Trailers....
Reefer Trailers. ...
Dump Trailers. ...
Dry Van Trailers. ...
Tanker Trailers. ...
Tipper Trailers.

7. DRAG REDUCTION OF ATRACTOR
TRAILER USING GUIDE VANES
The present invention relates to a vehicle having an
apparatus mounted thereon for reducing aerodynamic drag
and, more particularly, to a guide vane apparatus with an
airfoil cross-section mounted to the aft portion of a tractor
trailer.
1. Field of the Invention
The present invention relates to a vehicle having an
apparatus mounted thereon for reducing aerodynamic drag
and, more particularly, to a guide vane apparatus with an
airfoil cross-section mounted to the aft portion of a tractor
trailer.

8. BIBILOGRAPHY
The above Information is presented by the E-Referance from
the online Some Where Presented by our Knowledge

9. THANK YOU