Windscreen angle and Hood inclination optimization for drag reduction in cars

Vignesh, S.; Gangad, Vikas Shridhar; Jishnu,; Maheswarreddy,; Krishna, Amal; Mukkamala, Yagna S

doi:10.1016/j.promfg.2019.02.062

Cited by 10 publications

(1 citation statement)

References 13 publications

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“…Due to the influence of the boundary layer separation and wake region on the rear of the object, pressure drag is closely related to object geometry and provides for more than 80 % of the total drag on the vehicle [2,3]. The location of the boundary layer separation and wake directly becomes an essential factor in determining the value of aerodynamic drag, currently known as the drag coefficient (CD) [4].…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of Aerodynamics Truck Using Cylinder as Drag Reduction Device

Ainul Ghurri,

Muhamad Alim,

Made Nara Pradipta Adi

et al. 2023

ARFMTS

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Reducing drag is an excellent approach to improving truck efficiency and saving fuel. The addition of the cylinder could be an alternative for drag reduction devices like the windshield that has a similar function to enhance the truck’s aerodynamic performance. A numerical analysis was performed using Ansys Fluent CFD software to estimate the influence of the cylinder on the truck's drag force. The study was conducted by comparing truck without additional cylinder above the truck’s head, truck with windshield, and truck with cylinder variations, which round, type-I, and type-D cylinders. In the simulation, the analysis was carried out at a velocity of 30 m/s using the k-epsilon turbulence model. A grid independence test was conducted to minimize errors and optimize iteration time. The simulation results showed that using round, I-type, and D-type cylinders as an alternative to the windshield reduced the truck's drag coefficient, with the D-type cylinder achieving the highest reduction in drag coefficient, which is 0.72. Modifications in the design of the drag reduction cylinder can lower fuel consumption indirectly by 6.95 % using a D-type cylinder.

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Section: Introductionmentioning

confidence: 99%

CFD Simulation of Aerodynamics Truck Using Cylinder as Drag Reduction Device

Ainul Ghurri,

Muhamad Alim,

Made Nara Pradipta Adi

et al. 2023

ARFMTS

View full text Add to dashboard Cite

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Impact assessment of new generation high-speed agricultural tractor aerodynamics on transportation fuel consumption and related phenomena

Canlı

Küçüksariyildiz

Çarman

2022

Environ Sci Pollut Res

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New generation agricultural tractors contribute to transportation by increased travel speeds. There is not any available aerodynamic data on authentic agricultural tractor form. On-road transportation by tractors is between 8 to 30% of their operational time. In this work, two agricultural tractors are modelled via computational uid dynamics for nine different speeds to determine aerodynamic resistances.Corresponding speeds are 10 to 80 km/h with 10 km/h increments and additionally 5 km/h. Reynolds number changes between 1.6×10 5 and 2.98×10 6 . The characteristic lengths are taken as the square root of the streamwise projected area of the tractor geometries. Aerodynamic forces exerted on the tractors change between 3 N to 746 N. The calculated drag coe cients are found as independent from Reynolds number and are 0.6 and 0.78 for the two different types of driver compartments. Constant speed travel scenarios are analysed. The approximated aerodynamic related fuel consumptions for one-hour changes between 0.002 to 8.28 lt/s which correspond to 0.001 to 5.76 kg/s carbon emission. A potential improvement in decreasing aerodynamic resistance about 20% is discussed by spatial data. Since the conducted work is being regarded as the rst instance in the literature, it is estimated that several consecutive reports will be triggered.

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