Characterisation of the wake of the DrivAer estate vehicle

Avadiar, Terence; Thompson, Mark C.; Sheridan, John; Burton, David

doi:10.1016/j.jweia.2018.04.013

Cited by 24 publications

(5 citation statements)

References 26 publications

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“…Since its creation in 2012 [7,8], the DrivAer model has become a popular test case for studies where a realistic vehicle is preferred to a simplified geometry, as commonly used for studies of the underlying aerodynamic fundamentals. The DrivAer has therefore found applications in CFD particularly for the validation of commercial code, and increasingly by Original Equipment Manufacturers (OEM's) for more generic experimental work [7,8,[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]. However, because the model has a large number of variations, with three main rear end geometries, three cooling flow options, three under-body, two tyre and two wheel configurations, it is difficult to find two studies that use the same geometry.…”

Section: Introductionmentioning

confidence: 99%

Experimental Data for the Validation of Numerical Methods: DrivAer Model

Varney

Passmore

Wittmeier

et al. 2020

Fluids

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As the automotive industry strives to increase the amount of digital engineering in the product development process, cut costs and improve time to market, the need for high quality validation data has become a pressing requirement. While there is a substantial body of experimental work published in the literature, it is rarely accompanied by access to the data and a sufficient description of the test conditions for a high quality validation study. This paper addresses this by reporting on a comprehensive series of measurements for a 25% scale model of the DrivAer automotive test case. The paper reports on the measurement of the forces and moments, pressures and off body PIV measurements for three rear end body configurations, and summarises and compares the results. A detailed description of the test conditions and wind tunnel set up are included along with access to the full data set.

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Section: Introductionmentioning

confidence: 99%

Experimental Data for the Validation of Numerical Methods: DrivAer Model

Varney

Passmore

Wittmeier

et al. 2020

Fluids

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“…This can be anticipated because of the higher Reynolds number of experimental work. Bluff bodies with a higher back slanted surface are characterized by the domination of upwash and their flow tends to separate from the slanted surface as reported by [25].…”

Section: Validationmentioning

confidence: 77%

Investigation on Flow Characteristics of Generic Car Body with Different Boundary Conditions

2023

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In automotive aerodynamics, it is not common to focus on a specific vehicle due to restricted access to the CAD geometries, their short life span, and limited validation data. For this reason, researchers prefer generic bodies that look like automobiles such as Ahmed Body in their investigations. However, the absence of moving ground and rotating wheels makes these generic bodies unrealistic for aerodynamic studies. In this context, including wheels in CFD simulations, varying ground, and wheel boundary conditions, and comparing their qualitative and quantitative flow parameters with the original Ahmed Body experiment is the main objective of this paper. Results have shown that changing stationary ground and wheel boundaries into moving and rotating boundaries do have minor effects on wake characteristics and drag coefficients. However, just the presence of wheels on the model increases force coefficients significantly (increment in drag and lift coefficients by 27.32% and 188.5 counts, respectively.) even though these boundaries are stationary. As a result, the absence of moving ground and rotating wheels can be tolerated to some extent (especially for experimental studies in which inclusion of moving and rotating boundaries may have difficulties). However, a study cannot be evaluated exactly with a model without wheels.

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“…Newer, well defined geometries also appear with the likes of the DrivAer [36][37][38][39] model. With a more detailed geometry, more realistic cases can be examined; yet, the generalization of the phenomenon could be difficult since car shapes change over time.…”

Section: Notchbackmentioning

confidence: 82%

Quantitative Analysis of Drag Reduction Methods for Blunt Shaped Automobiles

Szodrai

2020

Applied Sciences

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In fluid mechanics, drag related problems aim to reduce fuel consumption. This paper is intended to provide guidance for drag reduction applications on cars. The review covers papers from the beginning of 2000 to April 2020 related to drag reduction research for ground vehicles. Research papers were collected from the library of Science Direct, Web of Science, and Multidisciplinary Digital Publishing Institute (MDPI). Achieved drag reductions of each research paper was collected and evaluated. The assessed research papers attained their results by wind tunnel measurements or calculating validated numerical models. The study mainly focuses on hatchback and notchback shaped ground vehicle drag reduction methods, such as active and passive systems. Quantitative analysis was made for the drag reduction methods where relative and absolute drag changes were used for evaluations.

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Characterisation of the wake of the DrivAer estate vehicle

Cited by 24 publications

References 26 publications

Experimental Data for the Validation of Numerical Methods: DrivAer Model

Experimental Data for the Validation of Numerical Methods: DrivAer Model

Investigation on Flow Characteristics of Generic Car Body with Different Boundary Conditions

Quantitative Analysis of Drag Reduction Methods for Blunt Shaped Automobiles

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