CFD ANALYSIS FOR DRAG FORCE REDUCTION IN BUSES
Keywords:
Drag force, aerodynamics, ANSYS, CFD, inter-city buses, CATIAAbstract
The road transportation vehicles are uneconomic nowadays. Because a vehicle after consuming fuel energy
in the form of diesel , petrol, CNG etc. Perform an inefficient task of speedy motion on the road. We are calling inefficient
because no engine has 100% efficiency, so some of the energy waste in form of heat and other by the vehicle aerodynamics
itself. We cannot save this waste energy but one can minimize it by using more efficient aerodynamic design. The fuel price
rising and strict government regulations are also a big problem. The bus body building companies’ focus on exterior styling
only and ignore the aerodynamics. The exterior design of the present intercity buses is very poor; due to this high drag force
is produced. Aerodynamically efficient designs can reduce engine load and fuel consumption is also reducing. The aim of
this project is using CFD to modify the structure of intercity bus in order to decrease the effect of drag force of the vehicle
which in turn leads to reduced fuel consumption of the vehicle. Two prototypes of bus body have been modeled in CATIA and
imported into ANSYS Workbench software, which is named as baseline model and modified model. Baseline model is the
existing intercity bus model and Modified model is with modification of existing intercity bus. The Modified model is used to
reduce the drag force by modifying and analyzing by using CFD. Due to this reduced the fuel requirement and increase the
performance occurs as a result of reduced drag force. The overall aerodynamic drag force is reduced.
