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Advances in Experimental Vehicle Soiling Tests
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
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The field of vision of the driver during wet road conditions is essential for safety at all times. Additionally, the safe use of the increasing number of sensors integrated in modern cars for autonomous driving and intelligent driver assistant systems has to be ensured even under challenging weather conditions. To fulfil these requirements during the development process of new cars, experimental and numerical investigations of vehicle soiling are performed. This paper presents the surface contamination of self- and foreign-soiling tested in the wind tunnel. For these type of tests, the fluorescence method is state-of-the-art and widely used for visualizing critical areas. In the last years, the importance of parameters like the contact angle have been identified when designing the experimental setup. In addition, new visualization techniques have been introduced. Based on these developments the complete process using the fluorescence method was evaluated and updated to the available technology. Various factors in the experimental setup were identified to improve the reliability and a resulting high repeatability of the experiments between different test sessions is shown. Additionally, new visualization techniques are introduced for enhanced data evaluation which allows an easier identification of possible measures. Due to the increased repeatability, it is now possible to calculate the absolute difference between two analyzed vehicle configurations. For the side mirror glass, the quality of the results is improved by image detection methods. In the end it is shown that these modifications to the process are helpful in evaluating the results of computational fluid dynamics.
CitationSchilling, F., Kuthada, T., Gaylard, A., Wiedemann, J. et al., "Advances in Experimental Vehicle Soiling Tests," SAE Technical Paper 2020-01-0681, 2020, https://doi.org/10.4271/2020-01-0681.
- Kuthada, T. and Cyr, S. , “Approaches to Vehicle Soiling,” in 4th FKFS Conference on Progress in Vehicle Aerodynamics and Thermal Management: Numerical Methods, 2006, 111-123.
- Hagemeier, T., Hartmann, M., and Thévenin, D. , “Practice of vehicle soiling investigations: A review,” International Journal of Multiphase Flow 37(8):860-875, 2011, doi:10.1016/j.ijmultiphaseflow.2011.05.002.
- Spruß, I., Landwehr, T., Kuthada, T., and Wiedemann, J. , “Advanced Investigation Methods on Side Glass Soiling,” in Progress in Vehicle Aerodynamics and Thermal Management, 2013, 167-181.
- Spruß, I. , “Ein Beitrag zur Untersuchung der Kraftfahrzeugverschmutzung in Experiment und Simulation,” Ph.D. thesis, University of Stuttgart, IVK, 2016.
- Hodgson, G., Passmore, M., Garmory, A., and Gaylard, A. , “An Objective Measure for Automotive Surface Contamination,” SAE Int. J. Passeng. Cars - Mech. Syst. 11(5):341-351, 2018, https://doi.org/10.4271/2018-01-0727.
- Vollmer, H. , “Neue Methoden zur Analyse der Benetzung von Pkw-Seitenscheiben,” Ph.D. thesis, University of Stuttgart, IVK, 2017.
- Landwehr, T. and Kuthada, T. , “Methodical Investigation of Vehicle Side Glass Soiling Phenomena,” in Progress in Vehicle Aerodynamics and Thermal Management:238-251, 2017.
- Gaylard, A., Kirwan, K., and Lockerby, D.A. , “Surface Contamination of Cars: A Review,” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 231(9):1160-1176, 2017, doi:10.1177/0954407017695141.
- Kabanovs, A. , “An Investigation of Road Vehicle Rear Surface Contamination and Its Simulation,” Ph.D. thesis, Loughborough University, AAE, 2019.
- Kuthada, T., Widdecke, N., and Wiedemann, J. , “Advanced Investigation Methods on Vehicle Soiling,” in International Vehicle Aerodynamics Conference, 2004.
- BMW Group , “Präsentation Workshop Umweltwindkanal,” https://www.press.bmwgroup.com/deutschland/article/attachment/T0080599DE/121310, Oct. 21, 2019.
- Mercedes-Benz Press Information , “Aerodynamics World Champion in Almost All Vehicle Classes,” Oct. 21, 2019.
- Bouchet, J.P., Delpech, P., and Palier, P. , “Wind Tunnel Simulation of Road Vehicle in Driving Rain of Variable Intensity,” in 5th MIRA International Conference on Vehicle Aerodynamics, Oct. 13, 2004.
- RUAG Aviation , “Capability Booklet Aerodynamics,” https://ruag.picturepark.com/Go/9em80sSl/V/12544/1, Oct. 21, 2019.
- Haitz’s Law,” Nature Photon 1(1):23, 2007, doi:10.1038/nphoton.2006.78.
- Landwehr, T., Kuthada, T., Widdecke, N., and Wiedemann, J. , “Investigation of Visibility Properties through Wetted Glass Planes on Vehicles,” in 16. Internationales Stuttgarter Symposium, 2016, 301-313, doi:10.1007/978-3-658-13255-2.
- Mikolajczyk, K., Tuytelaars, T., Schmid, C., Zisserman, A. et al. , “A Comparison of Affine Region Detectors,” International Journal of Computer Vision 65(1-2):43-72, 2005, doi:10.1007/s11263-005-3848-x.
- Gross, H. , editor, Handbook of Optical Systems: Volume 4: Survey of Optical Systems (Weinheim: Wiley-VCH, 2008). ISBN:978-3-527-40380-6.
- Landwehr, T. , “Neue Methoden zur Untersuchung der Sichtfreihaltung an Kraftfahrzeugen,” Ph.D. thesis, University of Stuttgart, IVK, to be published 2020.
- Gaylard, A., Kabanovs, A., Jilesen, J., Kirwan, K. et al. , “Simulation of Rear Surface Contamination for a Simple Bluff Body,” Journal of Wind Engineering and Industrial Aerodynamics 165:13-22, 2017, doi:10.1016/j.jweia.2017.02.019.
- Kabanovs, A., Garmory, A., Passmore, M., and Gaylard, A. , “Computational Simulations of Unsteady Flow Field and Spray Impingement on a Simplified Automotive Geometry,” Journal of Wind Engineering and Industrial Aerodynamics 171:178-195, 2017, doi:10.1016/j.jweia.2017.09.015.
- Gaylard, A. and Duncan, B. , “Simulation of Rear Glass and Body Side Vehicle Soiling by Road Sprays,” SAE Int. J. Passeng. Cars - Mech. Syst. 4(1):184-196, 2011, https://doi.org/10.4271/2011-01-0173.
- Jilesen, J., Gaylard, A., Linden, T., and Alajbegovic, A. , “Update on A-Pillar Overflow Simulation,” SAE Technical Paper 2018-01-0717, 2018, https://doi.org/10.4271/2018-01-0717.