Work

Aerodynamic optimization of car top box design for drag reduction using CFD and Kriging modeling

Year: 2025

Type: article

Abstract: In this paper, the influence of the shape parameters and position parameters of the car top box on the aerodynamic performance is studied. The flow field numerical simulation software STAR-CCM+ was used to conduct CFD simulation of the vehicle outflow field. Through comparative analysis, it was found that the contribution rate of the top box to the resistance coefficient of the vehicle was 10.39%, which proved the necessity of drag reduction optimization of the top box. Based on Isight optimization platform and aiming at reducing drag, the shape parameters and position parameters of the top box were optimized. The Kriging agent model is used to optimize the drag coefficient, and the post-processing diagrams of the outflow field before and after optimization are compared and analyzed, and the drag reduction mechanism is summarized. In addition, on the basis of the optimized vehicle model, the drag reduction slot is added to the bottom of the roof box, and the drag reduction is finally achieved by 5.2%. The aerodynamic drag reduction of the top box can enhance the power performance and fuel economy of the vehicle and reduce carbon emissions.

Source: Journal of Engineering Research

DOI: 10.1016/j.jer.2025.06.003

Authors: Yingchao Zhang, Ruizhuo Zhou, Chang Su, Zhe Zhang, Xiaowen Zang

Institution: Jilin University

Language: English

Topic: Aerodynamics and Fluid Dynamics Research

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Climate action

Open Access status: gold

Estimated APC paid: $1,100