Aerodynamic simulation of optimized vortex generators and rear spoiler for performance vehicles

Palanivendhan, M.; Chandradass, J.; Bannaravuri, Praveen Kumar; Philip, Jennifer; Shubham, Kumar

doi:10.1016/j.matpr.2021.02.537

Cited by 11 publications

(6 citation statements)

References 9 publications

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“…The difference of those papers mentioned are the type of model used, the wind speed and some slight modification of delta-shaped VG. Moreover, the delta VG also been combined with other passive flow control such as spoiler [34] [66]. Both of the research agrees that combination of VG with other passive flow control will reduce drag more effectively.…”

Section: Vortex Generatorsupporting

confidence: 59%

Review on Flow Controls for Vehicles Aerodynamic Drag Reduction

Mariaprakasam

Mat²,

Samin³

et al. 2023

ARFMTS

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Reducing aerodynamic drag in automobiles has been one of the focuses in automotive industry as it will increase vehicles performance and reduce power consumption which subsequently save the environment. Drag is a force that tend to pull the vehicle backwards. Pressure drag is the major contributor to drag of vehicle which caused by lower pressure in the rear area compared to front of vehicle. When vehicle moves forward, the stagnation point occurs in the front part of vehicle. The airflow then goes over the vehicle and separate at the back due to adverse pressure gradient. Thus, flow separation is created in the rear area of vehicle as indicated by the wake. Wake is a low-pressure region that need to be reduced so that the pressure between the front and rear could be reduced to minimize the drag. Flow control is introduced to delay this flow separation and it has been categorized as active and passive. Active flow controls require power input while passive flow controls do not need power input. This review article will explore those studies on flow controls applied in automobiles and investigate their working mechanisms along with research gaps detected. Relative comparison of effectiveness for each flow control is unfeasible as the parameters used differs but this problem can be resolved. Standard parameters need to be used in future researches in order address the discrepancy of results obtained from numerous studies around the globe. A current flow control technique is proposed to be conducted in UTM Aerolab to further investigate this interesting flow field.

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Section: Vortex Generatorsupporting

confidence: 59%

Review on Flow Controls for Vehicles Aerodynamic Drag Reduction

Mariaprakasam

Mat²,

Samin³

et al. 2023

ARFMTS

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“…A rear wing can give suitable downforce values and drag reduction by redirecting the flow of air at the right angle of approach to the wing and preventing flow separation. The drag reduction is obtained by changing the angle of attack of the airstream with the wing [38].…”

Section: Results Of 𝑪 𝑫 and Drag Force In The Modelmentioning

confidence: 99%

Aerodynamic Characteristics of Ahmed Body with Inverted Airfoil Eppler 423 and Gurney Flap on Fastback Car

Arifin

Suyitno

Tjahjana

et al. 2022

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The installation of aerodynamic devices, such as rear wings with the application of a Gurney flap, is very important to improve the performance of vehicles and can generate downforce and reduce slip when a car turns and brakes. The goal of this study was to determine the aerodynamic characteristics of the addition of a rear wing using an Eppler 423 airfoil, which was applied with a Gurney flap featuring variations in the angle of attack and the height of the Gurney flap. The rear wing was mounted on the Ahmed body with a rear slant angle of 15°, which is similar to the configuration on a fastback type car. This research was conducted by 3D modeling through computational fluid dynamics (CFD) simulation using ANSYS Student R18.2 by using ahmed body design. There are three variations in the angle of attack for the rear wing (0°, 7.5°, and 15°), as well as five variations in Gurney flap height of 0%, 0.5%, 1%, 1.5%, and 2% for the chord-line length. In this study, the best variation was found at an angle of attack of 15⁰ with a height of 2% C. From this configuration improved CL/CD ratio by 25.36% when compared to the results without a Gurney flap.

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“…The aerodynamic drag force is proportional to the square of the velocity of the car. 2 Moreover, Hucho and Sovran 3 concluded that aerodynamic drag produces 75%-80% of the total driving drag at 80 km/h driving speed. This indicates that reducing aerodynamic drag can effectively improve fuel economy.…”

Section: Introductionmentioning

confidence: 99%

Investigation of wheelhouse shapes on the aerodynamic characteristics of a generic car model

Zhou

Chen

Qin

et al. 2021

Advances in Mechanical Engineering

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As vehicle speed increases, the aerodynamic drag reduction becomes increasingly significant. The aim of this paper is to find out the effects of the wheelhouse shapes on the aerodynamics of an Ahmed body with a 35 slant angle. In this paper, based on the detached-eddy simulation method, the effects of the three classic different wheelhouse on the aerodynamic performance and near wake of the Ahmed body are presented. The mesh resolution and methodology are validated against the published test results. The results show that the front wheelhouse has a significant impact on the aerodynamic performance of the Ahmed body, leading to different aerodynamic drag forces and flow fields. Enlarging the wheelhouse cavity volume could result in a gradual increase in aerodynamic drag coefficients, the ratio of the wheelhouse cavity volume increased by 2.9% and 9.8%, the drag coefficients increased by 2.5% and 4.5% respectively. The increase in aerodynamic drag was primarily caused by flow separation in the large cavity volume wheelhouse.

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Aerodynamic simulation of optimized vortex generators and rear spoiler for performance vehicles

Cited by 11 publications

References 9 publications

Review on Flow Controls for Vehicles Aerodynamic Drag Reduction

Review on Flow Controls for Vehicles Aerodynamic Drag Reduction

Aerodynamic Characteristics of Ahmed Body with Inverted Airfoil Eppler 423 and Gurney Flap on Fastback Car

Investigation of wheelhouse shapes on the aerodynamic characteristics of a generic car model

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