Department of Mechanics and Fluid Dynamics, TU Bergakademie Freiberg, Lampadiusstrasse 4, 09599 Freiberg, Germany.
J Acoust Soc Am. 2011 Dec;130(6):EL373-9. doi: 10.1121/1.3655893.
Flow is studied through a channel with an oscillating orifice mimicking the motion of the glottal-gap during phonation. Simulations with prescribed flow and wall-motion are carried out for different orifice geometries, a 2D slit-like and a 3D lens-like one. Although the jet emerges from a symmetric orifice a significant deflection occurs in case of the slit-like geometry, contrary to the 3D lens-like one. The results demonstrate the dependency of jet entrainment and vortex dynamics on the orifice geometry and the interpretation of asymmetric jet deflection with regard to the relevance of the Coanda effect in the process of human phonation.
通过一个带有振荡孔的通道来研究流动，该振荡孔模拟发声时声门裂的运动。针对不同的孔几何形状（二维狭缝状和三维透镜状），进行了预定流量和壁面运动的模拟。尽管射流从对称孔中射出，但在狭缝状几何形状的情况下会发生明显的偏折，而在 3D 透镜状几何形状的情况下则不会。结果表明，射流卷入和涡动力学取决于孔几何形状，以及在人类发声过程中，柯恩达效应的相关性对非对称射流偏折的解释。
