Starting jet flows in a three-dimensional channel with larynx-shaped constriction
Starting jet flows in a three-dimensional channel with larynx-shaped constriction
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DOI：
10.1016/j.compfluid.2011.03.016
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发表时间：
2011-09-01
影响因子：
2.8
通讯作者：
Bruecker, Christoph
中科院分区：
文献类型：
--
作者：
Schwarze, Ruediger;Mattheus, Willy;Bruecker, Christoph
本文建立了喉状收缩通道内三维起动射流的数值模型。为了理解人类发声过程中流和声学之间的复杂耦合，有必要对这种喷流进行详细的解析。数值模型基于连续性方程和Navier-Stokes方程。这些研究是使用开源CFD软件包OpenFOAM完成的。数值模拟进行了方形截面通道的几何形状，这是一个固定的形状符合完全开放的人类声门收缩。时间依赖性流入边界条件，以模拟瞬态声门流速。数值模拟的设置对应于模型实验的配置，以便进行详细的验证。当声门区的近壁区域被数值网格充分地解决时，数值计算结果与实验数据吻合得很好。结果表明，射流和周围的旋涡之间的复杂的相互作用。(C)2011爱思唯尔有限公司版权所有。
A numerical model for the three-dimensional starting jet flow in a channel with a static larynx-shaped constriction is presented. Detailed resolution of this kind of jet flow is necessary in order to understand the complex coupling between flow and acoustics in the process of human phonation. The numerical model is based on the equation of continuity and the Navier-Stokes equations. The investigations are done with the open source CFD package OpenFOAM. Numerical simulations are performed for a square-sectioned channel geometry, which is constricted with a fixed shape conforming to the fully opened human glottis. Time-dependent inflow boundary conditions are applied in order to model transient glottal flow rates. The setup of the numerical simulations corresponds to the configuration of a model experiment in order to allow detailed validation. The numerical results are in good agreement with the experimental data, when the near-wall region in the glottal gap is adequately resolved by the numerical grid. The results illustrate the complex interactions between the jet flow and the surrounding vortices. (C) 2011 Elsevier Ltd. All rights reserved.