Drag reduction by application of aerodynamic devices in a race car

Nath, Devang S.; Pujari, Prashant Chandra; Jain, Amit; Rastogi, Vipul

doi:10.1186/s42774-020-00054-7

Cited by 20 publications

(8 citation statements)

References 10 publications

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“…Factors such as body shape, surface contours, and the arrangement of components play crucial roles in determining a vehicleʹs drag coefficient (Singh et al, 2020). As a vehicle moves through the surrounding air, it encounters resistance in the form of drag, which directly affects fuel efficiency and overall performance (Nath et al, 2021).…”

Section: Impact Of Car Design On Dragmentioning

confidence: 99%

“…In recent years, the push for increased fuel efficiency and reduced carbon emissions has spurred remarkable advancements in automotive engineering (Sivaraj et al, 2023). Aerodynamic drag is a critical consideration among the various factors influencing a vehicleʹs overall efficiency (Nath et al, 2021). About 50-60% of the fuel is burned to overcome drag, so reducing the drag coefficient is paramount for design sustainability (Hassan et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Drag on Passenger Cars: Computational Fluid Dynamics Analysis of 2D Body Design Using ANSYS Fluent

Martoma,

Kabala

2023

Preprint

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The automotive industry has witnessed a significant push towards increased fuel efficiency and reduced carbon emissions. Among many factors influencing overall vehicle efficiency, aerodynamic drag is a critical consideration, accounting for a substantial portion of fuel consumption. Our investigation focused on the drag coefficients of three prominent 2023 passenger car models – the Toyota Corolla, Hyundai Elantra, and Kia Soul. Using ANSYS Fluent to perform computational fluid dynamics, we demonstrated an inverse correlation between drag force and gas mileage, underlining the significance of aerodynamic design in fuel efficiency. Notably, the Hyundai Elantra emerged as the most aerodynamically efficient of the three vehicles, followed closely by the Toyota Corolla. In contrast, the boxier-designed Kia Soul exhibited significantly higher drag coefficients and drag forces, rendering it the least efficient of the trio. These findings emphasize the importance of environmental factors in car design. Shaping aerodynamic profiles directly impacts fuel efficiency, stability, and overall performance.

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Section: Impact Of Car Design On Dragmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Drag on Passenger Cars: Computational Fluid Dynamics Analysis of 2D Body Design Using ANSYS Fluent

Martoma,

Kabala

2023

Preprint

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“…The spoiler and diffuser combination gives better drag reduction in most racing cars. Among the different combinations (car with spoiler, car with wing, car with diffuser, car with fins, car with both spoiler and diffuser, car with both wing and diffuser and car with both fins and diffuser), the maximum drag reduction was observed for the car with spoiler and diffuser, with a maximum reduction of 16.53% (Nath et al , 2021). The rear diffuser on the underbody controls the flow separation for high-speed cars.…”

Section: Introductionmentioning

confidence: 99%

Flow control of a vehicle using reverse flow fan

Raj Mohamed,

2023

AEAT

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Purpose This study aims to achieve optimum flow separation control for a road vehicle using a reverse flow fan on rear side. Design/methodology/approach A full-length reverse flow fan array (fan’s air speed is 50% of the car’s speed) is attached throughout the width of the vehicle at rear edge corner. Findings The reverse flow fan array positioned at rear edge of car pushes the airflow against the car’s rear window. It creates the recirculation region and alters the pressure distribution. This reduces the lift coefficient by 150%, which becomes the downforce and reduces the drag coefficient by 22%. As the car speed increases, fan speed should also be increased for effective flow control. Research limitations/implications This active flow control method for 3D Ahmed car body has been studied computationally at low speed (40 m/s). Practical implications This design increases the downforce, thus gives better cornering speed and stability, and decreases the drag which improves fuel efficiency. It can be used for effective flow control of cars (hatchback/sedan). The findings can be applied to the bluff bodies, road vehicles, UAV and helicopter fuselage for flow separation control. Originality/value The fan array is attached on car’s rear side, which blows air against the car’s rear window. It alters the pressure distribution and aerodynamics forces favorably. But the existing high-speed fan used in a sports cars sucks the air from bottom and pushes it rearward, which increases both the traction force and drag.

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“…Flow-control devices, which can either be passive or active, are generally implemented on production and performance vehicles to reduce drag or to increase downforce [9][10][11][12]. Aerodynamic drag is the dominant resistive force for passenger cars traveling on the highway, and about 50% of the engine power is used to overcome this force [13].…”

Section: Introductionmentioning

confidence: 99%

Assessment of conventional and air-jet wheel deflectors for drag reduction of the DrivAer model

Nabutola

Boetcher

2021

Adv. Aerodyn.

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Aerodynamic drag is a large resistance force to vehicle motion, particularly at highway speeds. Conventional wheel deflectors were designed to reduce the wheel drag and, consequently, the overall vehicle drag; however, they may actually be detrimental to vehicle aerodynamics in modern designs. In the present study, computational fluid dynamics simulations were conducted on the notchback DrivAer model—a simplified, yet realistic, open-source vehicle model that incorporates features of a modern passenger vehicle. Conventional and air-jet wheel deflectors upstream of the front wheels were introduced to assess the effect of underbody-flow deflection on the vehicle drag. Conventional wheel-deflector designs with varying heights were observed and compared to 45∘ and 90∘ air-jet wheel deflectors. The conventional wheel deflectors reduced wheel drag but resulted in an overall drag increase of up to 10%. For the cases studied, the 90∘ air jet did not reduce the overall drag compared to the baseline case; the 45∘ air jet presented drag benefits of up to 1.5% at 35 m/s and above. Compared to conventional wheel deflectors, air-jet wheel deflectors have the potential to reduce vehicle drag to a greater extent and present the benefit of being turned off at lower speeds when flow deflection is undesirable, thus improving efficiency and reducing emissions.

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Drag reduction by application of aerodynamic devices in a race car

Cited by 20 publications

References 10 publications

Drag on Passenger Cars: Computational Fluid Dynamics Analysis of 2D Body Design Using ANSYS Fluent

Drag on Passenger Cars: Computational Fluid Dynamics Analysis of 2D Body Design Using ANSYS Fluent

Flow control of a vehicle using reverse flow fan

Assessment of conventional and air-jet wheel deflectors for drag reduction of the DrivAer model

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