대형 디젤 엔진 변속기 오일쿨링 팬 출구각도 변화가 팬 성능에 미치는 영향

In this study, effect of outlet angle variation of oil cooling fan for large diesel engine transmission on the fan performance was analyzed by using CFD. Exhaust mass flow rate at outlet, theoretical power and efficiency for various outlet angles were calculated numerically. Consequently, as the outlet angle was increased, the theoretical power and efficiency were a little mounted. Also, method to improving the fan performance was proposed. To verify the reliability of CFD results, Experiment following AMCA Standard 210-99 was carried out and then, CFD results and experimental results were compared. As the result, it could be confirmed a performance curve showed about 3% gap between experiment and CFD.