Study of Aerodynamic Forces on Double Decker Bus for Driving Stability

The title of this project is "Aerodynamic Study of Double Decker Bus for Driving
Stability". As portrayed by the title the objective of this project is to evaluate the
influence of aerodynamic forces on a double decker bus. The project is also
performed to ascertain the limits of the forces for driving stability. These objectives
are meant to solve the problems faced by the increasing number of cases of
overturned buses on the road. Besides that every vehicle has their own limitations on
different terrains. This is affected by many things such as the shape, weight, and
height. Though there are many studies on the ability of the passenger car, not many
researches are performed on the commercial vehicle.
This study covers experimentation and also simulation phases. The experiments is
performed in the windtunnel laboratory and the simulation is done using CATIA,
GAMBIT, and ANSYS. The experiment is performed for data collection and
interpretation for the project and the simulation purpose is to validate the fmdings of
the experiment. Through these activities the fmal result would be the achievement of
the objective of the project.
From the activities performed for this project, the results shows how aerodynamic
forces has very little effect to the stability of the double decker bus. This is mainly
due to the large mass of the vehicle. Eventhough the values could be seen as quite
significant, it is still not enough to critically effect the vehicle.
Besides that, this project also showed that the aerodynamic forces tend to be more
dominant is the higher speed regions. This fmding proves the equation used to fmd
calculate theoretical values of aerodynamic forces are correct.