Light & Engineering 28 (1)
Volume 28
Date of publication 02/20/2020
Pages 116–122
PDF
Sun Load Analysis and Testing on Automotive Front Lighting Products L&E 28 (1) 2020
Articles authors:
Emre Öztürk, Mehmet Aktaş, Tunç Şenyüz
Emre Öztürk, graduated from Bursa Uludag University, Faculty of Engineering and Architecture, Department of Industrial Engineering in 2008, has got Ms. Degree from Bursa Uludag University, Institute of Science and Technology, Department of Industrial Engineering – Engineering Technology and Management in 2014
Mehmet Aktaş graduated from Eskişehir Osmangazi University, Faculty of Engineering and Architecture, Department of Mechanical Engineering in 2011, has got his Ms. Degree from Eskişehir Osmangazi University, Institute of Science and Technology, Department of Mechanical Engineering – Energy in 2013
Tunç Şenyüz graduated from Canakkale Onsekiz Mart University, Faculty of Sciences and Arts, Department of Physics in 2006, has got his Ms. Degree from Canakkale Onsekiz Mart University, Institute of Science, Department of Space Science and Technologies in –2010, and Doctorate in Canakkale Onsekiz Mart University, Institute of Science, Department of Physics
Abstract:
The purpose of this research is to reach good correlation between sun load simulation and solar focusing test for exterior automotive lighting products. Light coming from sun is highly collimated (parallel rays) and focusable from lenses with concave structure. Focusing incidence leads to a hot spot on lens surrounding plastic parts which may cause melting failures at high temperature zones. Sun load simulation is performing to eliminate risk of discoloration, deformation, out gassing, coating failures and fire with prolonged exposure from field. Irradiance values in W/m2 defined in simulation as heat source depending of an angle of incidence of the sun radiation. At first step, simulation is performing with 5 degree intervals to define the critical zones then intervals decreased to 2 degree to detect the critical azimuth and inclination angles. Critical azimuth and inclination angles is checking with ray trace analysis to check the bouncing of sun rays and possible solution to eliminate focuses with design solutions. After numerical analysis to release and validate the automotive lighting products regarding the sun load test, measurement with first parts is necessary. Measurement is performing for all critical angles which have been detected at simulation with thermal camera under ultra high-collimation solar simulator. Measured temperatures are settled according to environment conditions and correlation is checking with simulations.
References:
1. Neonsee, Application Note, The burning glass effect optical hot spot characterization for the automotive industry, 2011, 1. 2. Sivak M, Schoettle B, Flannagan MJ Mercury-free HID lamps: glare and colour rendering. Light Res Technol, 2006, Vol. 38, #1, pp. 33–40. 3. Jang S, Shin WS Thermal analysis of LED arrays for automotive head lamp with a novel cooling system. IEEE Trans Dev Mater Reliab, 2008, 8, #3, pp. 561–564. 4. Kasten, F. and Young, A.T., Revised optical air mass tables and approximation formula. Applied Optics, 1989, #28, pp. 4735–4738. 5. Fischer, P., “Radiative Heat Redistribution and Natural Convection Flow Inside an Automotive Fog Lamp”, Proceedings of the Sixth International Symposium on Automotive Lighting, Darmstadt, Germany, 2001. 6. https://www.plastics.covestro.com/~/media/Product%20Center/PCS/Images/5_Library/ Product%20brochures/Apec/Apec%20brochure. pdf?la=en&force=1 7. B. v. Blanckenhagen, Accurate Stray Light Simulations with the Bi- Directional Reflection Distribution Function, ISAL, 2005, p.39.
Keywords
Number of images - 14
Tables and charts - 2
