Chandran K B, Khalighi B, Chen C J
J Biomech. 1985;18(10):763-72. doi: 10.1016/0021-9290(85)90051-x.
Pulsatile flow development past a caged ball valve in a model human aorta was studied using laser Doppler anemometry. Velocity profiles measured in the ascending aorta and in the mid-arch region were strongly influenced by the geometry of the valve at the root of the aorta. Velocity profiles distal to the valve were asymmetric with jet-like flow in the peripheral region having larger velocity magnitudes towards the left lateral wall. In early diastole, a streamwise vortex motion was observed throughout the model aorta with fluid moving towards the downstream direction along the left lateral wall and reversed flow along the right lateral wall. With the caged ball valve at the root of the aorta, no reversed flow was observed along the inner wall of curvature in the mid-arch region.
利用激光多普勒测速仪研究了模型人体主动脉中通过笼球瓣的脉动流发展情况。在升主动脉和主动脉弓中部区域测量的速度剖面受到主动脉根部瓣膜几何形状的强烈影响。瓣膜远端的速度剖面不对称，外周区域有类似射流的流动，朝着左侧壁的速度大小更大。在舒张早期，在整个模型主动脉中观察到一个流向涡旋运动，流体沿着左侧壁向下游方向流动，沿着右侧壁逆向流动。当笼球瓣位于主动脉根部时，在主动脉弓中部区域沿着弯曲内壁未观察到逆向流动。
