Flow over a membrane-covered, fluid-filled cavity.
Flow over a membrane-covered, fluid-filled cavity.
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流过膜覆盖、充满液体的腔体。
DOI：
10.1016/j.compstruc.2006.11.018
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发表时间：
2007
影响因子：
4.7
通讯作者：
Frankel,StevenH
中科院分区：
文献类型：
--
作者：
Thomson,ScottL;Mongeau,Luc;Frankel,StevenH
使用有限元分析探讨了覆盖位于刚性壁通道的一部分中的充满流体的腔体的膜的流动引起的响应。膜最初与通道壁对齐并将通道流体与腔流体分开。当流体流过膜覆盖的空腔时，依赖于流向的跨壁压力梯度导致膜变形。该模型可应用于语音产生研究中使用的声带覆盖层的合成模型。本文介绍了该模型，并总结了一系列流量和膜参数下通道流、膜和腔流的响应。结果表明，对于高腔体流体粘度值，腔内压力和梁偏转均达到稳定值。对于低空腔粘度和足够大的上游压力的组合，会导致大振幅的膜振动。通过在通道的相对侧创建空腔并向两个膜分配不同的刚度值来引入不对称条件。不对称性导致振动幅度减小或停止，具体取决于不对称程度，并且导致下游流场显着偏斜。
The flow-induced response of a membrane covering a fluid-filled cavity located in a section of a rigid-walled channel was explored using finite element analysis. The membrane was initially aligned with the channel wall and separated the channel fluid from the cavity fluid. As fluid flowed over the membrane-covered cavity, a streamwise-dependent transmural pressure gradient caused membrane deformation. This model has application to synthetic models of the vocal fold cover layer used in voice production research. In this paper, the model is introduced and responses of the channel flow, the membrane, and the cavity flow are summarized for a range of flow and membrane parameters. It is shown that for high values of cavity fluid viscosity, the intracavity pressure and the beam deflection both reached steady values. For combinations of low cavity viscosity and sufficiently large upstream pressures, large-amplitude membrane vibrations resulted. Asymmetric conditions were introduced by creating cavities on opposing sides of the channel and assigning different stiffness values to the two membranes. The asymmetry resulted in reduction in or cessation of vibration amplitude, depending on the degree of asymmetry, and in significant skewing of the downstream flow field.