International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 09 | Sep 2022
p-ISSN: 2395-0072
www.irjet.net
Aerodynamic study of LCV(Light Commercial Vehicle) and ways to improve it. AADITYA KURTE1 Bachelors of Engineering, Dept. of Mechanical Engineering, Rajiv Gandhi Institute of Technology, Mumbai, Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------1
Abstract - Light Commercial Vehicles (LCV) are
1.1 Methodology
commercial carrier vehicles with a gross vehicle weight of not more than 3.5 tons. The demand for LCVS is increasing appreciably in recent times due to many reasons, one of which is the increasing trend of homedelivered products encouraged by start-up culture. To date, not much research is done on improving the aerodynamics of these vehicles, as they were only used in heavy traffic zones. But the practice is now changed, LCVs are also used for transporting goods over longer distances. Improving the fuel economy and reducing aerodynamic noise at higher speeds by modifying the aerodynamic design of an LCV is therefore one of the potential areas of research interest. This paper deals with the aerodynamics of LCV and ways to improve it.
1.1 Modeling of the LCV The modeling of the LCV to analyze in ANSYS was done in Autodesk Fusion 360 taking the most common used LCV which is the TATA Ace truck in consideration its dimension where measured and appropriately scaled model was drawn and extruded in the software. To compare the modified LCV and Unmodified LCV design two models with the same dimensions were made.
Key Words: LCV, Aerodynamics, Fuel economy 1. INTRODUCTION Light commercial vehicles are considered aerodynamically inefficient compared to other passenger vehicles due to their un-streamlined body shapes. A typical light commercial vehicle traveling at 100 km/h consumes about approximately 30% of the total fuel to provide power to overcome the aerodynamic drag rag In contrast, a passenger car under the same driving conditions, consumes approximately two times less to overcome drag. Therefore, any reduction of aerodynamic drag will result in appreciable fuel savings and a reduction in greenhouse gas emissions. At high speeds, wind noises become more pronounced. making it difficult to hear or converse inside the cabin, even causing fatigue failure of vehicle components over long periods. At speeds over 80 km/h, the increase in aerodynamic noise is proportional to the order of V raising to 6 as compared to the increase in other noises which is proportional to the order of V-V², where V is the speed of the vehicle. This noise originates from sources at various parts of the vehicle, at different intensities that depend on the external shape of the vehicle. Therefore, it can be predicted that the trailer component of an LCV has a significant contribution in the wind noise generation. Therefore any modification to the trailer reducing the drag would also positively influence the wind noise as there exists an approximately direct correlation between drag coefficient and sound pressure levels.
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1.2 Equations used
2. Mesh Generation After 3D modeling of both the modified and unmodified LCV was done its meshing is done using Ansys Workbench software. Meshing uses different algorithms for different
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