Investigation of the effect of the use of top deflectors on aerodynamic performance in vehicles with CFD analysis

Yıl 2023, Cilt: 12 Sayı: 2, 44 - 50, 30.06.2023

Haydar Kepekçi

https://doi.org/10.18245/ijaet.1220476

Cited By: 2

Öz

Carbon-containing waste gases from vehicle exhausts are one of the main causes of climatic disasters. This problem is tried to be solved by reducing the amount of energy consumed by vehicles while they are in motion. To reduce fuel consumption, it is necessary to reduce the effect of aerodynamic drag force, which is the resistance on the solid surface in motion. It is known that high aerodynamic drag force increases fuel consumption. Reducing aerodynamic drag force is important not only for fuel consumption but also for wind noise and roadholding. Heavy vehicles such as trucks have high drag forces due to the width of their surface areas. However, this situation can be minimized with changes to be made in vehicle designs. In this study, the effect of the use of top deflectors on the drag force for trucks has been investigated. In this theoretical study, separate calculations have been made for different vehicle velocities and the results have been compared among themselves. In this study, which has been carried out using the computational fluid dynamics method, k-e has been preferred as the turbulence method. As a result, it has been concluded that the use of top deflectors reduces drag force, which in turn reduces fuel consumption.

Anahtar Kelimeler

Aerodynamics, CFD, Drag Force, Top Deflector

Kaynakça

• F. Rowe, C. Robinson, and N. Patias, “Sensing global changes in local patterns of energy consumption in cities during the early stages of the COVID-19 pandemic”, Cities, vol. 129, 103808, 2022.
• I. Nueza, R. Garcíaa, and J. Osoriob, “A comparative evaluation of CO2 emissions between internal combustion and electric vehicles in small isolated electrical power systems - A case study of the Canary Islands”, Journal of Cleaner Production, vol. 369, 133252, 2022.
• B. Steffen, and A. Patt, “A historical turning point? Early evidence on how the Russia-Ukraine war changes public support for clean energy policies”, Energy Research & Social Science, vol. 91, 102758, 2022.
• K. Kim, J. Lee, and J. Kim, “Can liquefied petroleum gas vehicles join the fleet of alternative fuel vehicles. Implications of transportation policy based on market forecast and environmental impact”, Energy Policy, vol. 154, 112311, 2021.
• W. Hanfeng, Z. Yu, Z. Chao, and H. Xuhui, “Aerodynamic drag reduction of an Ahmed body based on deflectors”, Journal of Wind Engineering and Industrial Aerodynamics, vol. 148, pp. 34-44, 2016.
• Z. Kasim, and A. Filippone, “Fuel savings on a heavy vehicle via aerodynamic drag reduction”, Transportation Research Part D: Transport and Environment, vol. 15 (5), pp. 275-284, 2010.
• H. Kepekci, “Comparative Numerical Aerodynamic Performance Analysis of NACA0015 and NACA4415 Airfoils” International Journal of Engineering, Science and Information Technology, vol. 2(1), pp. 144-151, 2022.
• K. Nabutola, and S. Boetcher (2021) “Assessment of conventional and air-jet wheel deflectors for drag reduction of the Drivaer model”, Advances in Aerodynamics, vol.3 (29), pp.1-28, 2021.
• M. Khosravi, F. Mosaddeghi, M. Oveisi, and A. Khodayari, “Aerodynamic drag reduction of heavy vehicles using append devices by CFD analysis”, International Journal of Heavy Vehicle Systems, vol. 19 (2), pp. 115-127, 2012.
• R. McAllen, D. Flowers, T. Dunn, J. Owens, F. Browand, A. Hammache, A. Leonard, M. Brady, K. Salari, W. Rutledge, R. Ross, B. Storms, T. Heinec, D. Driver, J. Bell, S. Walker, and G. Zilliac, “Aerodynamic Drag of Heavy Vehicles Simulation and Benchmarking”, SAE Technical Paper, pp. 2000-2209, 2000.
• R. Miralbel, and L. Castejon, “Aerodynamic analysis of some boat tails for heavy vehicles”, International Journal of Heavy Vehicle Systems, vol. 19, pp. 115−120, 2012.
• H. Chowdhury, H. Moria, A. Ali, I. Khan, F. Alam, and S. Watkins, “A study on aerodynamic drag of a semi-trailer truck”, Procedia Engineering, vol. 56, pp. 201 – 205, 2013.
• W. Gao., Z. Deng, and Y. He, “A Comparative Study of Tail Air-Deflector Designs on Aerodynamic Drag Reduction of Medium-Duty Trucks”, Aerodynamics of Road Vehicles, vol. 8 (2-3), pp. 316-333, 2022.
• C. Marks, F. Buckley, and W. Walston, “An Evaluation of the Aerodynamic Drag Reductions Produced by Various Cab Roof Fairings and a Gap Seal on Tractor-Trailer Trucks”, SAE Transactions, vol.85, pp. 366-374, 1976.
• C. Chilbule, A. Upadhyay, and Y. Mukkamala, “Analyzing the profile modification of truck-trailer to prune the aerodynamic drag and its repercussion on fuel consumption”, Procedia Engineering, vol.97, pp. 1208-1219, 2014.
• H. Chowdhury, R. Juwono, M. Zaid, R. Islam, B. Loganathan, and F. Alam, “An experimental study on the effect of various deflectors used for light trucks in Indian subcontinent”, Energy Procedia, vol. 160, pp. 34-39, 2019.
• H. Chowdhurya, B. Loganathana, I. Mustarya, H. Moriab, and F. Alama, “Effect of various deflectors on drag reduction for trucks”, Energy Procedia, vol.110, pp. 561- 566, 2017.
• H. Kepekci, B. Zafer, H. Guven, and B. Korbahti, “Aeroacoustics Investigation of a Wind Turbine for Different Blade Tip Shapes Using Computational Fluid Dynamics Software”, Fresenius Environmental Bulletin, vol.30 (11), pp.12037-12047, 2021.
• K. Flack, M. Schultz, and R. Volino, “The effect of a systematic change in surface roughness skewness on turbulence and drag”, International Journal of Heat and Fluid Flow, vol. 85, 108669, 2020.
• F. Millan, T. Makela, L. Parras, C. Pino, and C. Ferrera, “Experimental study on Ahmed's body drag coefficient for different yaw angles”, Journal of Wind Engineering and Industrial Aerodynamics, vol. 157, pp. 140-144, 2016.
• I.T. Ince, H. Mercan, and N. Onur, "Experimental and numerical analysis of flow over a pickup truck”, Heat Transfer Research, vol. 52(17), pp. 1- 17, 2021.
• F. Kaya, and İ. Karagöz, “Girdaplı Modellerin Türbülans Modellerinin Uygunlupunun İncelenmesi”, Uludağ Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi, vol. 12(1), pp. 85-96, 2007.