고속 회전하는 볼베어링 내 공기 유동구조 수치해석 연구A Computational Investigation on Airflow Structures Inside a Ball Bearing at High- Speed Rotation
- Other Titles
- A Computational Investigation on Airflow Structures Inside a Ball Bearing at High- Speed Rotation
- Authors
- 김동주; 오일석; 홍성욱; 김경진
- Issue Date
- 2011
- Publisher
- 한국정밀공학회
- Keywords
- Ball Bearing (볼베어링); CFD Analysis (전산유동해석); Airflow (공기유동); Flowfield Characteristics (유동특성)
- Citation
- 한국정밀공학회지, v.28, no.6, pp 745 - 750
- Pages
- 6
- Journal Title
- 한국정밀공학회지
- Volume
- 28
- Number
- 6
- Start Page
- 745
- End Page
- 750
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/23109
- ISSN
- 1225-9071
2287-8769
- Abstract
- In a hope to better understand the flow and convective heat transfer characteristics inside a ball bearing, air flow between the rolling elements and raceways at high speed bearing rotation is numerically investigated using a simplified inner geometry of bearing and a CFD technique. Flow simulation results reveal the pressure distribution of airflow and the shear stress distribution on the ball surface, of which nonuniformity becomes significant with the increasing rotational speed.
Also, the local point of maximum shear stress coincides with the stagnation flow area on the surface of rolling elements. A complex pattern of three-dimensional vortex structures is found in the air flow due to the relative motion of bearing elements and three different types of vortex pairs exist around the rotating and orbiting rolling elements.
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Collections - School of Mechanical System Engineering > 1. Journal Articles
- Department of Mechanical Engineering > 1. Journal Articles
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