Orclever Proceedings of Research and Development

Analysis of Earth-Moving Machinery Cabin Windshield Defrosting Performance with Computational Fluid Dynamics Method and Verification by Testing

Ekin Can Kayar

Hidromek

https://orcid.org/0009-0004-4191-587X

DOI: https://doi.org/10.56038/oprd.v3i1.287

Keywords: CFD, Defrost, Air Conditioning, Heat Transfer

---

Abstract

Driver and passenger safety and thermal comfort are seen as the most important parameters in the development of earth-moving machinery cabin air conditioning systems. The formation of a layer of ice and fog on the windshield restricts the driver's field of vision and distracts driving attention. For this reason, the earth-moving machinery air conditioning system has an important place. The ability of the defrosting and defogging system is measured by how quickly and effectively the ice layer formed on the glass is dissolved and to what extent the mist formed inside the glass is cleared. In this study, three-dimensional air conditioning numerical analysis was carried out using the Computational Fluid Dynamics (CFD) method in order to remove ice formed on the windshield of the earth-moving machinery cabin. The earth-moving machinery cabin was used as a mathematical model. Boundary and initial conditions were chosen to be the same as the test data to ensure appropriate validation. By solving the numerical analysis energy equation, time-dependent temperature distribution and defrosting time in the windshield area were analysed. Validation was provided by comparing the results with test data. As a result of the analysis, it was understood that the windshield defrosting time, which is of vital importance for driving safety due to visibility restrictions, especially in regions with cold climates, can be optimized by analysing it with numerical analyses.

---

References

Kumar V., Tare K., Sangeet K., 2010. Deployment of CFD for Optimization of the Air Flow Distribution Over the Windscreen and Prediction of Defrost Performance, SAE International 2010-01 – 1059. DOI: https://doi.org/10.4271/2010-01-1059

Sevilgen Gökhan, Kılıç Muhsin, 2012, 'Otomobillerde Camlar Üzerinde Oluşan Buğunun Hızlı Olarak Giderilmesinde Menfez Geometrisi, Hava Hız, Nem ve Sıcaklığın Etkisinin HAD Yöntemi İle Analizi', Uludağ Üniversitesi, BURSA.

Nasr, K. J., and AbdoulNour, B. S., 2000. “Defrosting of Automotive Windshield: Progress and Challenges”, Int. J. Of Vehicle Design, Vol 23, pp. 360-375, 2000. DOI: https://doi.org/10.1504/IJVD.2000.001901

Farag, A. and Huang, L.-J. 2003. “CFD Analysis and Validation of Automotive Windshield De-Icing Simulation,” SAE Technical Paper 2003-01-1079, 2003. DOI: https://doi.org/10.4271/2003-01-1079

Park, W.G., Park, M.S. and Jung,Y.R. and Jang, K.L. (2005), “Numerical Study of Defrosting Phenomena of Automotive Windshield Glass”, Numerical Heat Transfer, Part A: Applications, 47:7, 725-739. DOI: https://doi.org/10.1080/10407780590911512

K. Willenborg, J.F. Foss, R.S. AbdulNour, J.J. McGrath, B.S. AbdoulNour, 1997. A model defroster flow, in: Proceeding of the Eleventh Symposium on Turbulent Shear Flows, vol. 2, pp. 15.25–15.30.

Y. Ikeda, N. Katoh, N. Ishii, T. Kuriyama, 1997. Numerical analysis of the airflow on windows from defroster nozzles, JSAE Paper 924076 (in Japanese).

M. Sugano, T. Yamada, Y. Takesue, T. Yasuki, 1994. Numerical analysis of defroster cleaning pattern, JSAE Paper 9432912 (in Japanese).

B.S. AbdoulNour, J.F. Foss, 1997, Computational and experimental predictions of automotive windshield flow, in: Proceedings of ASME Fluids Engineering Division Summer Meeting, ASME Paper No. FEDSM97-3022.

Kılıç, M., Sevilgen, G. 2012. The effects of using different type of inlet vents on the thermal characteristics of the automobile cabin and the human body during cooling period. The International Journal of Advanced Manufacturing Technology, 60(5-8), 799-809. DOI: https://doi.org/10.1007/s00170-011-3594-x

Osman T., Özcan A. (2004) Uçak Kanatlarının CFD Analizi, İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, İstanbul.

ANSYS Fluent Theory Guide, ANSYS, Inc. USA, 2016.

Roy Subrata, Nasr Karim, Patel Paresh, (2002) 'An experimental and numerical study of heat transfer off an inclined surface subject to an impinging airflow' International Journal of Heat and Mass Transfer 45 1615–1629. DOI: https://doi.org/10.1016/S0017-9310(01)00276-9

ISO International Standard, Earth moving machinery, Operator enclosure environment, Windscreen defrosting system test method, 2009.