Simulation of Aerodynamic Uplift Consequences on Pressure Repartition – Application on an Innovative Wiper Blade Design

Billot, Philippe; Jallet, Sébastien; Marmonier, Frédéric

doi:10.4271/2001-01-1043

Cited by 13 publications

(2 citation statements)

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“…With the improvement of computing power, 3D simulations of the vehicle wipers' aerodynamic characteristics started appearing. The aerodynamic characteristics of the components of wipers were studied, and improvements by adding spoilers and fins were proposed (Billot et al, 2001;Harashima et al, 1997;Takada et al, 2003). Recently, the changes in aerodynamic lift of a windshield wiper with the variation of its shape and rotation angle were studied (Jallet et al, 2001;Hur et al, 2011;Ha et al, 2013;Zhang, 2010;Lin et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Research on transient aerodynamic characteristics of windshield wipers of vehicles

Chen

Gu²,

Jiang

2019

HFF

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Purpose The main purpose of this paper is to gain a better understanding of the transient aerodynamic characteristics of moving windshield wipers. In addition, this paper also strives to illustrate and clarify how the wiper motion impacts the airflow structure; the aerodynamic interaction of two wipers is also discussed. Design/methodology/approach A standard vehicle model proposed by the Motor Industry Research Association and a pair of simplified bone wipers are introduced, and a dynamic mesh technique and user-defined functions are used to achieve the wiper motion. Finite volume methods and large eddy simulation (LES) are used to simulate the transient airflow field. The simulation results are validated through the wind tunnel test. Findings The results obtained from the study are presented graphically, and pressure, velocity distributions, airflow structures, aerodynamic drag and lift force are shown. Significant influences of wiper motion on airflow structures are achieved. The maximum value of aerodynamic lift and drag force exists when wipers are rotating and there is a certain change rule. The aerodynamic lift and drag force when wipers are rotating downward is greater than when wipers are rotating upward, and the force when rotating upward is greater than that when steady. The aerodynamic lift and drag forces of the driver-side wiper is greater than those of the passenger-side wiper. Originality/value The LES method in combination with dynamic mesh technique to study the transient aerodynamic characteristics of windshield wipers is relatively new.

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Section: Introductionmentioning

confidence: 99%

Research on transient aerodynamic characteristics of windshield wipers of vehicles

Chen

Gu²,

Jiang

2019

HFF

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“…Later they validated their numerical results by experiments. Billot et al [4] continued the former study in [3] and investigated a new type flat wiper blade on a car geometry which was positioned in the mid-wipe position. For a speed of 160 km/h they calculated 9.8 N lift force for the conventional type wiper blade without a spoiler and 7.4 N lift force for the wiper blade with the spoiler.…”

Section: Introductionmentioning

confidence: 99%

Improving aerodynamic performance for a reliable wiper system

Çadırcı¹,

Ak²,

Selenbas³

et al. 2017

International Journal of Automotive Engineering and Technologies

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In this study, it is aimed to simulate aerodynamic forces acting on the windshield wiper system on a simplified geometry at different blade angles. Numerical simulations reveal that at critical blade angles, undesired lift forces can reach their peak values. The blade-spoiler geometry is modified in a manner to alter aerodynamic lift and drag coefficients. On a simplified front windshield it is shown that at a blade angle of 40  , lift forces can be converted to pressing forces by implementing suggested modifications. Furthermore 2 vortex identification is used to understand the formation of vortex structures at different blade angles. On the other hand, soiling tests are performed both on original and modified wiper geometries and their performances are compared.

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Funktion, Sicherheit und Komfort

Höfer¹,

Mößner²

2005

Aerodynamik Des Automobils

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Simulation of Aerodynamic Uplift Consequences on Pressure Repartition – Application on an Innovative Wiper Blade Design

Cited by 13 publications

References 0 publications

Research on transient aerodynamic characteristics of windshield wipers of vehicles

Research on transient aerodynamic characteristics of windshield wipers of vehicles

Improving aerodynamic performance for a reliable wiper system

Funktion, Sicherheit und Komfort

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