초박형 노트북 냉각 터보팬의 유동 및 소음 분석

다국어 초록 (Multilingual Abstract)

In recent years, a notebook like an ultrabook gets thinner. Its thickness causes problems in cooling fan performance, system installation condition, and so on. In this study, we installed a small turbofan in notebook system with very narrow gap in order to generate similar condition to a real product. Experiments were performed to measure the fan`s performance and the flow and noise characteristics, its results were compared with computational ones. Prediction of P-Q curve using CFD showed under about 5% error in high flow rate and its trend was agreed with experimental one over the flow field. Experimental data to measure the noise at a distance of 100 mm from a rotation axis direction of an impeller corresponded well with computational ones of broadband and BPF noise. The noise experiments to measure at a distance of 100 mm from a rotation axis direction of an impeller corresponded well with computational ones of broadband and BPF noise. Especially, tip part of impeller blade and part of exit and bottom near cut off of a casing were dominant noise source in an analysis by a commercial program(FlowNoise)

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 비정상 유동 및 유동소음의 수치해석기법
• 3. 실험 장치 및 해석 조건
• 4. 해석 결과
• 5. 결론
• 참고문헌