The effect of front and rear windscreen angles on the aerodynamic drag force of a simplified car model

Yıl 2019, Cilt: 6 Sayı: 3, 83 - 88, 05.12.2019

Mohamed Elrawemi , İbrahim Ibrahim Aburawey

https://doi.org/10.31593/ijeat.610436

Cited By: 2

Öz

Computational fluid dynamic (CFD) is a flow modelling technique which utilizes iterative methods to solve continuity and momentum equations along with any appropriate auxiliary equations depending on the application. This paper studied the effect of front and rear windscreen angles of a car on the drag force for the case of the Citroen C5 2007. Numerical results were obtained based on the finite volume method (FVM). The aerodynamic behavior of the car was studied with different front and rear windscreen angles. The initial results helped to estimate an optimal shape for the car based on the least drag coefficient. Consequently, an optimal car shape is proposed by improving the car’s aerodynamic design including the surface roughness and windscreen angles. This has potentially reduced the drag coefficient by 8.88 % compared to the initial design. This would offer a significant opportunity for reducing the fuel consumption.

Anahtar Kelimeler

Drag coefficient, Airflow, CFD, FVM, Aerodynamic

Kaynakça

• [1] Hassan, S. R., Islam, T., Ali, M., & Islam, M. Q. (2014). Numerical study on aerodynamic drag reduction of racing cars. Procedia Engineering, 90, 308-313.
• [2] Guilmineau, E. (2008). Computational study of flow around a simplified car body. Journal of wind engineering and industrial aerodynamics, 96(6-7), 1207-1217.
• [3] Mohamed-Kassim, Z., & Filippone, A. (2010). Fuel savings on a heavy vehicle via aerodynamic drag reduction. Transportation Research Part D: Transport and Environment, 15(5), 275-284.
• [4] Kim, J. J., Hong, J., & Lee, S. J. (2017). Bio-inspired cab-roof fairing of heavy vehicles for enhancing drag reduction and driving stability. International Journal of Mechanical Sciences, 131, 868-879.
• [5] Raveendran, A., Sridhara, S. N., Rakesh, D., & Shankapal, S. R. (2009). Exterior styling of an intercity transport bus for improved aerodynamic performance (No. 2009-28-0060). SAE Technical Paper.
• [6] Buil, R. M., & Herrer, L. C. (2009). Aerodynamic analysis of a vehicle tanker. Journal of Fluids Engineering, 131(4), 041204.
• [7] Gu, Z. Q., & He, G. M. (2014). Analysis on the driving stability of high-speed container truck in crosswinds. Trans Beijing Inst Technol, 34, 250-254.
• [8] Singh, S. N., Rai, L., Puri, P., & Bhatnagar, A. (2005). Effect of moving surface on the aerodynamic drag of road vehicles. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 219(2), 127-134.
• [9] Bayındırlı, C . (2019). Drag reduction of a bus model by passive flow canal. International Journal of Energy Applications and Technologies, 6 (1), 24-30. DOI: 10.31593/ijeat.533745
• [10] Bruneau, C. H., Creusé, E., Depeyras, D., Gilliéron, P., & Mortazavi, I. (2010). Coupling active and passive techniques to control the flow past the square back Ahmed body. Computers & Fluids, 39(10), 1875-1892.
• [11] Krajnović, S., & Fernandes, J. (2011). Numerical simulation of the flow around a simplified vehicle model with active flow control. International Journal of Heat and Fluid Flow, 32(1), 192-200.
• [12] Hassan, S. R., Islam, T., Ali, M., & Islam, M. Q. (2014). Numerical study on aerodynamic drag reduction of racing cars. Procedia Engineering, 90, 308-313.
• [13] Bijlani, B., Rathod, P., & Sorthiya, A. (2013). Experimental investigation of aerodynamic forces on sedan, fastback and square-back car by simulation in CFD Review Study. Int J Emerg Technol Adv Eng, 3(2), 346-349.
• [14] Usherwood, J. R., & Lehmann, F. O. (2008). Phasing of dragonfly wings can improve aerodynamic efficiency by removing swirl. Journal of The Royal Society Interface, 5(28), 1303-1307.
• [15] Yunus, A. C. (2010). Fluid Mechanics: Fundamentals And Applications (Si Units). Tata McGraw Hill Education Private Limited.
• [16] Malviya, Vihar, Mishra, Rakesh and Fieldhouse, John D. (2008) Comparative computational analysis of drag¬reducing devices for tractor trailers. In: Proceedings of Computing and Engineering Annual Researchers' Conference 2008: CEARC’08. University of Huddersfield, Huddersfield, pp. 1¬8. ISBN 978¬1¬86218¬067¬3.
• [17] Yuan, Z., & Wang, Y. (2017). Effect of underbody structure on aerodynamic drag and optimization. Journal of Measurements in Engineering, 5(3), 194-204.
• [18] Guo, Z., Zhang, Y., & Ding, W. (2019). Optimization of the aerodynamic drag reduction of a passenger hatchback car. Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 233(8), 2819-2836.
• [19] Khondge, A. D., Sovani, S., & Verma, G. (2011). Automation of vehicle aerodynamic shape exploration and optimization using integrated mesh morphing and CFD (No. 2011-01- 0170). SAE Technical Paper.