Chahine G L
Dynaflow, Inc., Fulton, MD 20759, USA.
J Heart Valve Dis. 1996 Mar;5(2):207-14; discussion 214-5.
This paper discusses scaling laws of cavitation in mechanical heart valves based on analysis of leaflet operation and on hydrodynamic theory. It then suggests the laboratory use of large geometric scales and testing at low operating pressures to more easily investigate new heart valve designs. With such scaling, observations and measurements will become easier since the cavitation regions will be larger in dimension and the time scales will be increased due to reductions of bubble characteristic times and leaflet oscillation periods. The paper also discusses cavitation noise and the potential for acoustic detection of cavitation in a mechanical heart valve.
本文基于对瓣叶运行情况的分析和流体动力学理论，探讨了机械心脏瓣膜中空化的比例定律。然后建议在实验室使用较大的几何尺度，并在低工作压力下进行测试，以便更轻松地研究新型心脏瓣膜设计。通过这种比例缩放，观察和测量将变得更加容易，因为空化区域的尺寸会更大，并且由于气泡特征时间和瓣叶振荡周期的减小，时间尺度会增加。本文还讨论了空化噪声以及机械心脏瓣膜中空化的声学检测潜力。
