Numerical Analysis on Aerodynamic Forces on Wiper System

Yang, Zhi; Ju, Xiong; Li, Q. L.; Li, Jiachun; Fu, Song

doi:10.1063/1.3651879

Cited by 5 publications

(6 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The numerical results are consistent with the experimental data. The change trend of aerodynamic lift achieved here coincides well with the results calculated by Yang et al (2011) and other related references (Seung et al 2011). The deviation of the magnitude is due to the different configurations of wiper-blades.…”

Section: Fig 8steady-state Aerodynamic Lift At Different Wind Speedssupporting

confidence: 80%

“…Figure 10 shows the evolution of aerodynamic lift of each wiper at a wind speed of 18m/s with the change of rotation angles. The results at a wind speed of 70km/h achieved by Yang et al (2011) are introduced as a comparison. The value of aerodynamic lift of each wiper peaks around the 45-degree rotation angle.…”

Section: Fig 8steady-state Aerodynamic Lift At Different Wind Speedsmentioning

confidence: 99%

“…Based on the analysis of flow structures around the wipers at different rotational angles, as well as a bare windshield reference case, the effect of wipers on the local flow around the windshield was studied by Gaylard et al (2006). Yang et al (2011) simulated the flow fields around driver side wiper and passenger side wiper at different wiping angles and vehicle speeds separately. The above-mentioned studies offer reasonable results for the design of windshield wipers.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Research on the Aerodynamic Lift of Vehicle Windshield Wiper

Chen

Peng

2016

JAFM

View full text Add to dashboard Cite

Currently, research on the aerodynamic lift of vehicle windshield wipers is confined to the steady results, and there are very few test results. In the face of this truth, a wind tunnel test is conducted by using the Multipoint Film Force Test System (MFF). In this test, the aerodynamic lift of four kinds of wiper is measured at different wind speeds and different rotation angles. And then, relevant steady-state numerical simulations are accomplished and the mechanism of the aerodynamic lift is analyzed. Furthermore, combined with dynamic meshing and user-defined functions (UDF), transient aerodynamic characteristics of wipers are obtained through numerical simulations. It is found that the aerodynamic lift takes great effect on the stability of wipers, and there is maximum value of the lift near a certain wind speed and rotation angle. The lift force when wipers are rotating with the free stream is less than steady, and the force when rotating against the free stream is greater than steady.

show abstract

Section: Fig 8steady-state Aerodynamic Lift At Different Wind Speedssupporting

confidence: 80%

Section: Fig 8steady-state Aerodynamic Lift At Different Wind Speedsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research on the Aerodynamic Lift of Vehicle Windshield Wiper

Chen

Peng

2016

JAFM

View full text Add to dashboard Cite

show abstract

“…Their study provided a description of the flow and vortex structures associated with wiper systems. Yang et al (2011) numerically studied the aerodynamics around flat blade wipers on a car geometry. They used seven different wiping angles varying between 0° to 90° with an increment of 15° and carried out simulations at three vehicle speeds which are 30, 50 and 70 km/h.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation of Wiper System Performance at High Speeds

Çadırcı¹,

Ak²,

Selenbas³

et al. 2017

JAFM

View full text Add to dashboard Cite

In this study, aerodynamic forces acting on the windshield wiper system at critical wiper angles are simulated using different wiper blade geometries, i.e., wiper and spoiler modifications, to solve the wiping problem occurring at high speeds due to lifting forces. Undesired aerodynamic lift forces reach a peak at critical blade angles, thus turbulent air flow around the wiper blades at critical angles on a car model is investigated numerically in detail to solve this problem. Previous experimental studies have shown that the front windshield wiper blades can be lifted up by aerodynamic forces between wiper blade angles of 30-40°, if no geometric modifications are done to prevent this. The possible modifications which can have a positive effect on wiper's performance include wiper's profile (also spoiler's curvature), wiper's height and connection type of the rubber part to the metal part. Aerodynamic lift and drag forces acting on the wiper blade and wiper arm are calculated for both driver's and passenger's sides. It is revealed that for both wiper blades on the driver's and passenger's sides, an increased wiper height with a blunt connection type can supply most satisfactory results in terms of decreased lift forces, in other words negative lift forces. Utilizing the output of the numerical analysis, the new wiper-blade-spoiler profile is selected and then manufactured to test its wiping performance in a thermal wind tunnel by soiling tests. Numerical studies are validated by experimental tests, since the new wiper profile has been proven as a more efficient prototype in terms of wiping performance compared to the original one.

show abstract

“…Gaylard et al [5] carried out numerical and experimental studies using a conventional type wiper blade in a sport utility vehicle at different wiping angles with the aim to understand flow and vortex structures near windshield wiper blades. Yang et al [6] numerically studied with conventional type wiper blades on a car geometry. They used seven different wiping angles between 0° and 90° with an increment of 15° and worked at three different vehicle speeds such as 30, 50 and 70 km/h.…”

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

View full text Add to dashboard Cite

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.

show abstract

Numerical Analysis on Aerodynamic Forces on Wiper System

Cited by 5 publications

References 3 publications

Research on the Aerodynamic Lift of Vehicle Windshield Wiper

Research on the Aerodynamic Lift of Vehicle Windshield Wiper

Numerical and Experimental Investigation of Wiper System Performance at High Speeds

Improving aerodynamic performance for a reliable wiper system

Contact Info

Product

Resources

About