팁 간격이 덕티드 팬의 공력 및 소음 성능에 미치는 영향에 관한 전산해석COMPUTATIONAL ANALYSIS OF TIP CLEARANCE EFFECT ON AERODYNAMIC AND ACOUSTIC PERFORMANCE OF THE DUCTED FAN
- Other Titles
- COMPUTATIONAL ANALYSIS OF TIP CLEARANCE EFFECT ON AERODYNAMIC AND ACOUSTIC PERFORMANCE OF THE DUCTED FAN
- Authors
- 황유현; 김시진; 조규철; 명노신; 이학진
- Issue Date
- Dec-2023
- Publisher
- 한국전산유체공학회
- Keywords
- 전산유체역학(Computational Fluid Dynamics); 격자-볼츠만 법(Lattice-Boltzmann Method); 로터 공력성능 (Rotor Aerodynamic Performance); 공력 소음(Aerodynamic Noise); 덕티드 팬(Ducted Fan); 팁 간격(Tip Clearance)
- Citation
- 한국전산유체공학회지, v.28, no.4, pp 106 - 116
- Pages
- 11
- Indexed
- KCI
- Journal Title
- 한국전산유체공학회지
- Volume
- 28
- Number
- 4
- Start Page
- 106
- End Page
- 116
- URI
- https://scholarworks.gnu.ac.kr/handle/sw.gnu/69140
- DOI
- 10.6112/kscfe.2023.28.4.106
- ISSN
- 1598-6071
- Abstract
- A ducted fan offers improved safety by preventing object collisions and shielding the rotating blades. The tip clearance is an important parameter that can control the strong vortex generated at the rotating blade tips and impacts the performance. This study conducted computational analysis to investigate the effect of tip clearance on the aerodynamic performance and noise level of a ducted fan in hover condition using lattice-Boltzmann method (LBM) simulations. The tip clearance was defined as s/R = 1%, 2%, 4% using propeller radius(R), and computational analysis was conducted, including an propeller without duct. The thrust contribution of duct system was confirmed through the axial velocity field and surface pressure contour on ducted fan. Duct Shielding effect and aerodynamic noise level were investigated by comparing the overall sound pressure level (OASPL). Moreover, the directionality of noise propagation was observed using the instantaneous sound pressure field with various tip clearances. As a result, the strength of blade tip vortex increased as the tip clearance increased, thus leading to increase in tonal and broadband noise. It was concluded that a reduced tip clearance demonstrated enhanced noise reduction performance for the ducted fan.
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Collections - 공학계열 > 기계항공우주공학부 > Journal Articles
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