열-음향 상호작용을 고려한 라디에이터 홴 덕트 최적화 연구

Abstract

Although radiators have been actively used to manage the high thermal energy of internal combustion engines, the market size is increasing despite the recent rapid growth of electric vehicles. Radiators for vehicles were usually used with fans for effective thermal management. Radiators and fans improved heat dissipation performance in various ways. However, the noise covered in the internal combustion engine is emerging as a new problem in electric vehicles. Accordingly, it is required to develop the radiator fan considering the aeroacoustic characteristics. Ducts that may affect heat dissipation performance are generally used for the noise reduction of the fans. Therefore, heat dissipation performance and aeroacoustic characteristics for three design variables determining the aspect ratio of the ducted radiator fan were analyzed in this study. The results calculated numerically were used for optimization after analysis using the response surface methodology. A clear difference in noise characteristics was found according to the receivers. The heat dissipation performance was more influenced by the duct than the noise, and the Nusselt number was improved by 2.54% through optimization. Appropriate duct optimization considering both heat dissipation performance and noise reduction is important to design the radiator fan.