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Temperature Measurement of a Vehicle's Windshield Using Liquid Crystals
Technical Paper
2002-01-0221
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The impingement of air jets on a vehicle's windshield is one parameter that determines the effectiveness of the defroster's system in freeing the windshield of frost and fog. Incompressible air jets impinge upon the inner surface of the windshield and create hydrodynamic and thermal boundary layers which in turn control convective heat transfer. Therefore, understanding the heat transfer interaction between impinging air jets and an inclined windshield is of practical relevance. Experimental investigations on the temperature distribution are performed on the inner surface of the windshield for the purpose of obtaining local and average heat transfer coefficients. In this paper, the temperature distribution of a vehicle's windshield is investigated using liquid crystals. As a result, a temperature contour map is generated displaying local temperature values on the inner surface of the windshield. The strongly non-uniform air velocities at the defroster's nozzles are also measured for both the driver's and the passenger's sides.
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Citation
Nasr, K. and AbdulNour, B., "Temperature Measurement of a Vehicle's Windshield Using Liquid Crystals," SAE Technical Paper 2002-01-0221, 2002, https://doi.org/10.4271/2002-01-0221.Also In
References
- AbdulNour, R. S. Willenborg, K. Foss, J. F. McGrath, J. J. AbdulNour, B. S. 1997 “Measurements of the Convective Heat Transfer Coefficient for a Two-Dimensional Wall Jet: Uniform Temperature and Uniform Heat Flux Boundary Conditions” Proceeding of ASME Heat Transfer Division Ulucakli M.E. et al. 3 109 116
- Andreone, L. Burzio, G. Damiani, S. Romitelli, G. 1992 “Automatic Measurement of Defrosting/Defogging Process” 2nd Int. Conf. on Vehicle Comfort Ergonomic, Vibrational, Noise, and Thermal Aspects, ATA Paper 92A272
- Carignano, M. Pippione, E. 1990 “Optimization of Wind-Screen Defrosting for Industrial Vehicles Via Computer Assisted Thermographic Analysis” FIJITA Paper 905237
- Downs, S. J. James, E. H. 1987 “Jet impingement Heat Transfer-a Literature Survey” ASME Paper No. 87-HT-35
- Ishihara, Y. Shibata, M. Hoshino, H. Hara, J. Kamemoto, K. 1992 “Analysis of Interior Airflow in a Full-Scale Passenger-Compartment Model Using a Laser-Light-Sheet Method” SAE Paper 920206
- Loefdahl, L. Johansson, B. Ljus, C. Alleving, P. 1996 “A Fast Simple Hot-Wire Method of Determining the Mean Velocity Vector of Complex Three-Dimensional Flows” Experiments in Fluids 20 398 400
- Martin, H. 1977 “Heat And Mass Transfer Between Impinging Gas Jets And Solid Surfaces”
- Advances in Heat Transfer Academic Press New York 13 1 60
- Moffat, R. J. 1988 “Describing the Uncertainties in Experimental Results,” Experimental Thermal and Fluid Science 1 3 17
- Nasr, K.J. AbdulNour. B.S. 2000 ‘Defrosting of Automotive Windshields: Progress and Challenges’ Int. J. of Vehicle Design 23 ¾ 360 375
- Polat, S. Huang, B. Mujumdar, A.S. Douglas, W.J.M. 1989 “Numerical Flow and Heat Transfer Under Impinging Jets: A Review,” Annual Review of Numerical Fluid Mechanics and Heat Transfer 2 157 197
- SAE J902 “Passenger Car Windshield Defrosting Systems” SAE Recommended Practice 1994
- Simonich, J. C. Moffat, R.J. New technique for mapping heat transfer coefficient contours Rev. Sci. Instrum. 1982 53 5 678 683
- Viskanta, R. 1993 “Heat Transfer To Impinging Isothermal Gas And Flame Jets” Experimental Thermal and Fluid Science 6 111 134
- Willenborg, K. Foss, J. F. AbdulNour, R. S. McGrath, J. J. AbdulNour, B. S. 1997 “A Model Defroster Flow” Proceedings of the Eleventh Symposium on Turbulent Shear Flows 2 15.25 15.30