Aerodynamics of Race Car Liftoff

Katz, Joseph; Garcia, Darwin; Sluder, Robin

doi:10.4271/2004-01-3506

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…Katz J. [1] has provided a rather complete discussion introducing the various methods employed in race car design to generate additional downforce through the installation of inverted wings, diffusers, and vortex generators. McBeath S. [2] has conducted a detailed investigation on wings, defining all the characteristic parameters, the types (single, double and multi-elements), the design criteria and the influence of different modifications for different configurations of the wings; it has been highlight how steeper angles and a double-element wing yield higher downforce, being efficient in terms of "downforce to drag" balance.…”

Section: Introductionmentioning

confidence: 99%

CFD Research and Investigation of 2011 P4/5 Competition Rear Wing

Pugliese

Yang

2013

AMM

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In order to analyze the influence of the rear wing of a competition race car on the aerodynamics of the whole vehicle, computational fluid dynamics simulations have been performed. Rear wing is set by two elements, a main plate and a flap. Their relative position and the angle of attack of these elements influence the aero- performances in terms of downforce and drag generated; 12 different configurations have been generated, modifying the angle of attack and the slot gap. 3D mesh has been generated from the geometrical model of the vehicle, and air flow around the vehicle and on the rear wing has been evaluated through a CFD commercial software. It has been proved that steeper angles of attack of the mainplate and of the flap contribute to generate more downforce until a certain point; when angle of attack reaches a critical value, the downforce no longer increases and the drag still keep high values.

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Section: Introductionmentioning

confidence: 99%

CFD Research and Investigation of 2011 P4/5 Competition Rear Wing

Pugliese

Yang

2013

AMM

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CFD Analysis of Car Body Aerodynamics Including Effect of Passive Flow Devices – A Review

Ahmed¹

2016

IJRET

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With the emphasis lying on increasing fuel efficiency of vehicles in order to combat rising fuel prices and environmental challenges the manufacturers are thinking beyond the conventional vehicle systems by focusing on its aerodynamics. Aerodynamic drag exceeds 50 per cent of the total resistance to motion at speeds above 70km/hr, and above 100 km/hr it is the most important factor. The review is done to identify the various shortcomings of the automotive designers when it is in regards to flow separation of air at the rear of the vehicle which causes most of the losses. This paper focuses on the work already done in the field of aerodynamics starting with Ahmed Body. It is a bluff body with adjustable rear slant angle and the basis upon which the aerodynamicists test their models. And then, moving onto passive aerodynamic enhancements for automobiles like vortex generators and diffusers whose various dimensional modulations were discussed with several steps leading to its advancement in vehicle body design. This brings to the simulation, Computational Fluid Dynamics (CFD) and its role in this analysis was covered. CFD has been modified a lot from the beginning to increase the accuracy of its predictions. So the paper lists various simulation techniques studied by the previous researchers in order to understand the wake region behind the car which has been notoriously difficult to predict till date. Several aspects of aerodynamic drag that need further analysis to improve the aerodynamic were highlighted.

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Towards Balanced Aerodynamic Axle Loading of a Car with Covered Wheels—Inflatable Splitter

et al. 2022

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Generating aerodynamic downforce for the wheels on the front axle of a car is a much more difficult task than for the rear axle. This paper, submitted to the special issue of Energies “Future of Road Vehicle Aerodynamics”, presents an unusual solution to increase the aerodynamic downforce of the front axle for cars with covered wheels, with the use of an elastic splitter. The effect of the inflatable splitter on the aerodynamic forces and moments was studied in a DrivAer passenger car and a fast sports car, Arrinera Hussarya. Providing that the ground clearance was low enough, the proposed solution was successful in increasing the front axle downforce without a significant increase in drag force. The possibility of emergency application of such a splitter in the configuration of the body rotated by up to 2 degrees with the front end raised was also analyzed. An elastic, deformed splitter remained effective for the nonzero pitch case. The results of the calculations are presented in the form of numerical data of aerodynamic forces, pressure and velocity distributions, and their comparisons. The benefits of the elastic splitter are documented, and the noted disadvantages are discussed.

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Aerodynamics of Race Car Liftoff

Cited by 4 publications

References 6 publications

CFD Research and Investigation of 2011 P4/5 Competition Rear Wing

CFD Research and Investigation of 2011 P4/5 Competition Rear Wing

CFD Analysis of Car Body Aerodynamics Including Effect of Passive Flow Devices – A Review

Towards Balanced Aerodynamic Axle Loading of a Car with Covered Wheels—Inflatable Splitter

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