A Numerical Study of the Effect of Small Passenger Car's Grille Shape on the Aerodynamic Performance

소형 승용 차량의 그릴 형상이 차량의 공력 성능에 미치는 영향에 관한 수치해석 연구

  • Received : 2014.07.02
  • Accepted : 2014.09.02
  • Published : 2015.01.01


A numerical parametric study has been accomplished to figure out the effect of grille shape built in a small passenger car on the aerodynamic performance such as drag and mass flow rate through CRFM(Condenser Radiator Fan Module). Three grille opening parameters and three grille mesh parameters are selected and adopted to a simple shape passenger car model. This research will provide a design guideline for grille opening geometry and mesh shape in the grille. FLUENT, which is very well known commercial code, hires k-${\epsilon}$ turbulence model at the driving speed of 110km/h with moving wall boundary condition. A porous media condition is prepared to estimate the pressure drop amount through CRFM parts.


Small passenger car;CRFM;Numerical analysis;Grille opening;Grille mesh;Aerodynamic performance;Flow rate


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  1. Grille design for passenger car to improve aerodynamic and cooling performance using CFD technique vol.17, pp.6, 2016,


Grant : Stagnation Pressure Management to Reduce Aerodynamic Drag for Inside Front Bumper

Supported by : 한국지엠주식회사