Yaw angle effect on the aerodynamic performance of hatchback vehicle fitted with wing spoiler
DOI:
https://doi.org/10.11113/mjfas.v15n3.1105Keywords:
Yaw angle, spoiler, aerodynamicsAbstract
Research on spoiler available to date was mainly done to optimize the performance of spoiler in non-zero yaw condition. However, the effect of spoiler is most needed during cornering to ensure the stability of the vehicle. Therefore, this study aims to inspect the effect of yaw angles change on the aerodynamic performance of the NACA 0018 wing spoiler and the subsequent influence on the flow characteristics of the hatchback vehicle. Computational Fluid Dynamics (CFD) has been applied to model the flow. Comparison between numerically obtained results and experimental data was done to validate the CFD method. The findings show that both the drag coefficient, Cd, and lift coefficient, Cl have increased with increasing yaw angle. However, the spoiler has performed in favor of reducing the Cd and Cl even with increasing yaw angle. The averaged proportion contributions from the spoiler to the overall Cd and Cl are 2.7% and 4.1%, respectively. The other body parts that have contributed to the Cd and Cl reductions were the base and slant, and the roof.
References
Ahmed, S. R., Ramm, G., Faltin, G. 1984. Some salient features of the time-averaged ground vehicle wake (ISSN 0148-7191). No. 840300. SAE Technical Paper.
Alawi, O. A., Sidik, N. A. C., Tey, W. Y. 2015. A numerical study of heat transfer to turbulent separation nanofluid flow in an annular passage. Jurnal Teknologi (Sciences & Engineering), 77(8), 75-82.
Bello-Millán, F., Mäkelä, T., Parras, L., del Pino, C., Ferrera, C. 2016. Experimental study on Ahmed's body drag coefficient for different yaw angles. Journal of Wind Engineering and Industrial Aerodynamics, 157, 140-144.
Cheng, S., Mansor, S. 2017. Rear-roof spoiler effect on the aerodynamic drag performance of a simplified hatchback model. Paper presented at the Journal of Physics: Conference Series, 822(1): 012008.
Cheng, S. Y. 2007. The effect of building shape modification on wind pressure differences for cross-ventilation of a low-rise building. International Journal of Ventilation, 6(2), 167-176.
Cheng, S. Y., Mansor, S. 2017. Influence of rear-roof spoiler on the aerodynamic performance of hatchback vehicle. Paper presented at the The 2nd International Conference on Automotive Innovation and Green Vehicle (AiGEV 2016), 90: 01027.
Daryakenari, B., Abdullah, S., Zulkifli, R., Sundararajan, E., Sood, A. M. 2013. Numerical study of flow over Ahmed body and a road vehicle and the change in aerodynamic characteristics caused by rear spoiler. International Journal of Fluid Mechanics Research, 40(4), 354-372.
Hu, X., Wong, T. 2011. A numerical study on rear-spoiler of passenger vehicle. World Academy of Science, Engineering and Technology, 5(9), 1800-1805.
Hucho, W.-h., Sovran, G. 1993. Aerodynamics of road vehicles. Annual Review of Fluid Mechanics, 25(1), 485-537.
Jahi, T. M., Zawawi, H. I., Rahman, N. A. 2015. Effect of skirt angle and feathers formation on shuttlecock aerodynamics performance. Jurnal Teknologi, 76(8), 95-99.
Kieffer, W., Moujaes, S., Armbya, N. 2006. CFD study of section characteristics of Formula Mazda race car wings. Journal of Mathematical and Computer Modelling, 43(11-12), 1275-2387.
Kim, I., Chen, H., Shulze, R. C. 2006. A rear spoiler of a new type that reduces the aerodynamic forces on a mini-van (ISSN 0148-7191). No. 2006-01-1631. SAE Technical Paper.
Kodali, S., Bezavada, S. 2012. Numerical simulation of air flow over a passenger car and the influence of rear spoiler using CFD. International Journal of Advanced Transport Phenomena, 1(1), 6-13.
Missel, P. J., Horner, M., Muralikrishnan, R. 2010. Simulating dissolution of intravitreal triamcinolone acetonide suspensions in an anatomically accurate rabbit eye model. Pharmaceutical Research, 27(8), 1530-1546.
Mitra, D. 2010. Effect of relative wind on notch back car with add-on parts. International Journal of Engineering Science and Technology, 2(4), 472-476.
Munir, F. A., Mohd Azmi, M., Razali, N., Tokit, E. M. 2012. The effect of parameter changes to the performance of a triangular shape interrupted microchannel heat sink. Journal Teknologi (Sciences & Engineering), 58(2), 33-37.
Shafie, N. E. A., Kamar, H. M., Kamsah, N. 2015a. A CFD simulation of PM1 and CO air contaminants in a bus passenger compartment. Jurnal Teknologi (Sciences & Engineering), 77(30), 35-39.
Shafie, N. E. A., Kamar, H. M., Kamsah, N. 2015b. Effects of ventilation setups on air flow velocity and temperature fields in bus passenger compartment. Jurnal Teknologi (Sciences & Engineering), 77(30), 49-53.
Torabmostaedi, H., Zhang, T., Foot, P., Dembele, S., Fernandez, C. 2013. Process control for the synthesis of ZrO2 nanoparticles using FSP at high production rate. Powder Technology, 246, 419-433.
Tsai, C. H., Fu, L. M., Tai, C. H., Huang, Y. L., Leong, J. C. 2009. Computational aero-acoustic analysis of a passenger car with a rear spoiler. Applied Mathematical Modelling, 33(9), 3661-3673.
