대한의용생체공학회:학술대회논문집 (Proceedings of the KOSOMBE Conference)
- 대한의용생체공학회 1998년도 추계학술대회
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- Pages.247-248
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- 1998
열림판이 지지대에 고정되지 않은 폴리우레탄 인공판막 하류의 유동장 측정
Measurement of Flow Field Downstream of Polyurethane Artificial Heart Valve with Floating Valve Leaflet
- 김중경 (서울대 대학원 협동과정 의용생체공학) ;
- 성재용 (서울대 대학원 기계공학과) ;
- 장준근 (서울대 정밀기계설계공동연구소) ;
- 민병구 (서울대 의대 의공학교실) ;
- 유정열 (서울대 기계공학과)
- Kim, J.K. (Interdisciplinary Program in Medical and Biological Engineering Major, Graduate School, Seoul National University) ;
- Sung, J. (Department of Mechanical Engineering, Graduate School, Seoul National University) ;
- Chang, J.K. (Institute of Advanced Machinery and Design, Seoul National University) ;
- Min, B.G. (Department of Biomedical Engineering, College of Medicine, Seoul National University) ;
- Yoo, J.Y. (Department of Mechanical Engineering, Seoul National University)
- 발행 : 1998.11.20
초록
The effect of unattached valve leaflet on flow field downstream of a floating and flapping polyurethane heart valve prosthesis was investigated. With a triggering system and a time-delay circuit the instantaneous velocity field downstream of the valve was measured by particle image velocimetry (PIV) in conjunction with the opening posture of a flexible valve leaflet during a cardiac cycle. Reynolds shear stress distribution was calculated from the velocity fields and wall shear stress was directly measured by hot-film anemometry (HFA). The floating motion of the valve leaflet resulted in the reduction of pressure drop and recirculating flow region downstream of the valve.
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