Aerodynamic Analysis of Ground Vehicles with Luggage Carrier (Roof Rack) 2019-26-0067
Any change in vehicle external design affects the aerodynamic characteristics. Generally different types of roof racks are attached on passenger vehicles to carry luggage which affects aerodynamic drag. The objective of this work is to perform aerodynamic analysis of SUV with roof rack to investigate the change in drag coefficient. First, the aerodynamic analysis of baseline SUV model to perform with and without generic roof rack at 80 kmph. Further analysis is carried out with different new design of roof rack. Based on simulation results a scaled down prototype model is fabricated and validated by using wind tunnel test for optimum suitable case. The modelling of the vehicle is doe in CATIA tool and simulation is carried using ANSYS Fluent. The results show drag reduction of around 9% with the new design of roof rack as compared to generic roof rack which improved fuel economy to around 11%.
Keywords: Aerodynamics, Passenger car, Drag coefficient, Roof rack, Fuel economy.
Pranav Anil Hol, Mohammad Rafiq Agrewale
Automotive Research Association of India
Symposium on International Automotive Technology 2019