Turbulent stress measurements downstream of six mechanical aortic valves in a pulsatile flow model.
作者： J.M. Hasenkam , H. Nygaard , M. Giersiepen , H. Reul , H. Stødkilde-Jørgensen
DOI: 10.1016/0021-9290(88)90201-1
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摘要: Abstract In a pulsatile flow model aortic Bjork-Shiley Standard, Convex-Concave and Monostrut valves were investigated together with the Hall-Kaster (Medtronic-Hall), St Jude Medical Starr-Edwards Silastic Ball valve using hot-film anemometry. Three-dimensional visualization of average systolic Reynolds normal stresses (RNS) reflected design valves. Mean RNS used for comparison fluid dynamic performance along Velocity Energy Ratio (VER 100 ) Turbulence (TER) as relative turbulence intensity flow. ranged from 13.2 to 37.6 Nm −2 all highest levels Standard lowest values in between.
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