Study on aerodynamics characteristics an urban concept car for energy-efficient race

[摘要] »Horas Mesin USU» is a prototype of urban concept vehicle designed by University of Sumatera Utara to participate in the energy-efficient competition. This paper deals with a numerical study on aerodynamic characteristics of the Horas Mesin USU. The numerical analyses are carried out by solving the governing equations using CFD FLUENT commercial code. The turbulent flow is closed using k-epsilon turbulence model. In the results, pathline, velocity vector and pressure distribution are plotted. By using the pressure distributions, drag and lift coefficients are calculated. In order to make a comparison, the aerodynamic characteristics of the present design are compared with commercial city car Ford-Fiesta. The averaged drag coefficients of Horas Mesin USU and Ford-Fiesta are 0.24320 and 0.29598, respectively. On the other hand, the averaged lift coefficients of the Horas Mesin USU and Ford-Fiesta are 0.03192202 and 0.09485621, respectively. This fact suggests that Ford-Fiesta has a better aerodynamic performance in comparison with Horas Mesin USU. The flow field analysis shows that there are many modifications can be proposed to improve the aerodynamic performance of the Horas Mesin USU. It is suggested to perform further analysis to improve the aerodynamic performance of Horas Mesin USU.

[发布机构] Sustainable Energy and Biomaterial Centre of Excellent, Faculty of Engineering, Universitas of Sumatera Utara, Jl. Almamater Kampus USU, Medan; 20155, Indonesia^1;Sarulla Operation Ltd., Energy Building 51st Floor, SCBD Lot 11A, Jl. Jend. Sudirman, Jakarta; 12190, Indonesia^2;Department of Mechanical Systems of Enginering, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran; 050-8585, Japan^3

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Aero-dynamic performance;Aerodynamic characteristics;Concept vehicles;Drag and lift coefficients;Energy efficient;Flow field analysis;Governing equations;K-epsilon turbulence model