Aerodynamics Drag Reductions Methodology for the Commercial Vehicles Using Computational Fluid Dynamics

Nalanagula, Santosh; Varadharajan, G T

doi:10.4271/2016-01-8139

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…Aerodynamic drag accounts more than half of the total resistance for automoblie vehichles, especially at high speed [2]. And remarkable reduction of fuel or conservation in electric energy cusumption can be achieved through reducing aerodynamic drag [3][4][5]. Thereforce, reducing aerodynamic drag of road vehicles has a great significance for energy saving and ecological protection.…”

Section: Introductionmentioning

confidence: 99%

Drag reduction characteristics of automobile vehicles with rear truncated-pyramid shape spoiler

Chen

Fan³

et al. 2023

Third International Conference on Mechanical Design and Simulation (MDS 2023)

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Drag reduction of automobile vehicle has a great significance for energy saving and ecological protection. A novel wake structural truncated-pyramid shape spoiler is proposed in the paper to reduce aerodynamic drag induced by rear base, and the simplified Ahmed's model is established based on COMSOL RANS k-ε turbulent flow module, and the modeling approach yields good agreement with the former experimental and simulation results. The effect of spoiler geometry parameters on velocity distribution and drag coefficient under typical wind speed is also analysed through the modeling.The results indicate that drag coefficient can be reduced up to 38.27% through installing the truncated-pyramid spoiler, and the drag coefficient roughly decreases with the increasing of truncated-pyramid height and the decreasing of truncated-pyramid shrinkage. The research would provide a new way for mobile vehicles with bluff wake body to improve the aerodynamic performance.

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Section: Introductionmentioning

confidence: 99%

Drag reduction characteristics of automobile vehicles with rear truncated-pyramid shape spoiler

Chen

Fan³

et al. 2023

Third International Conference on Mechanical Design and Simulation (MDS 2023)

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“…Passive drag reduction methods are heavily researched and applied because they do not require additional external energy and are more effective in reducing drag at high speeds. For example, the installation of deflectors can reduce the aerodynamic drag of the vehicle [3]; the addition of pneumatic accessories can improve the air flow between the cab and the cargo area and thus reduce the aerodynamic drag on the vehicle [4]. However, compared with the passive drag reduction methods mentioned above, the aerodynamic drag caused by the cargo compartment accounts for a larger proportion of the aerodynamic drag of the whole vehicle [5], some scholars have established connection channels at the side and rear of the cargo compartment [6], but they cannot be widely used because of the impact on the skeleton structure of the cargo compartment.…”

Section: Introductionmentioning

confidence: 99%

Research on Drag Reduction of Heavy Truck Tail

Xu¹,

Gong²,

Zheng³

et al. 2022

HSET

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In order to reduce the aerodynamic drag coefficient of a heavy van truck, three single-variable and one multi-variable composite drag reduction devices were designed based on the rear structure of the heavy van truck. The results show that among the three single-variable drag reduction devices, the inclination angle θ of the linear type drag reduction device has the greatest influence on the aerodynamic resistance coefficient of heavy vans truck, and the model has the best drag reduction effect when the inclination angle θ=20°, the aerodynamic drag coefficient is 0.7693, and the drag reduction rate is 7.64%. The radius R of the arc drag reducing device has the least influence on the aerodynamic drag coefficient. The multivariable composite drag reduction structure also has a good drag reduction effect. The study can provide a reference for the optimal design of the rear structure of related vehicles.

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“…In the future, internal combustion engines will be replaced by electric vehicles, fuel cell vehicles, and hybrid vehicles. Limited driving range is one of the challenge due to battery developments of electrical vehicles [9,10]. In Turkey, there are few competitions organized by TEKNOFEST and TUBITAK Efficiency Challenge is a college-level student design competition in which students from colleges around the country to design and compete with racetracks each year.…”

Section: Introductionmentioning

confidence: 99%

CFD Modelling of Voltacar Electric Vehicle Body for the Most Efficient Driving Conditions

Süzen¹,

Özdoğan²,

San³

et al. 2021

enenstrg

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In recent years, fossil fuels prices, greenhouse gas emissions, and need for sustainable energy sources have been increasing day by day. Thus, electric vehicles are seen as a promising candidate in the market due to their low-costs and cleaner fuel options such as electricity, hydrogen etc. Moreover, aerodynamics is one of the most important criteria to consider while designing an automobile for the most efficient driving conditions. For this reason, vehicle developers are studying to reduce drag resistance of the body to improve driving efficiency. On the other hand, Computational Fluid Dynamics (CFD) is one of the main tools for the automotive industry to obtain low-cost results before prototyping of any product. In this study, the aerodynamic characteristics of VoltaCAR electric vehicle is numerically investigated to obtain the best driving velocity. This car participates the TUBITAK-Electromobile car competition every year to achieve low fuel consumption for one hour driving. Thus, it is aimed that to minimize the resistance of the air hitting from the front, side, and roof of the vehicle. In the numerical model, polyhedral mesh structure is preferred to obtain faster convergence with fewer iterations, and shorter computation time is obtained compared to the tetrahedral mesh method. The aerodynamic drag coefficient (Cd) of the car model was calculated as approximately 0.17 at 22.22 and 27.78 m/s. The optimum velocity values were selected as 22.22 and 27.78 m/s by means of their lower Cd.

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Aerodynamics Drag Reductions Methodology for the Commercial Vehicles Using Computational Fluid Dynamics

Cited by 5 publications

References 18 publications

Drag reduction characteristics of automobile vehicles with rear truncated-pyramid shape spoiler

Drag reduction characteristics of automobile vehicles with rear truncated-pyramid shape spoiler

Research on Drag Reduction of Heavy Truck Tail

CFD Modelling of Voltacar Electric Vehicle Body for the Most Efficient Driving Conditions

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