Jiang Weili, Zheng Xudong, Farbos de Luzan Charles, Oren Liran, Gutmark Ephraim, Xue Qian
Mechanical Engineering Department, Rochester Institute of Technology, Rochester, NY 14623, USA.
Mechanical Engineering Department, University of Maine, Orono, ME 04469, USA.
Bioengineering (Basel). 2023 Oct 18;10(10):1215. doi: 10.3390/bioengineering10101215.
This study used a two-dimensional flow-structure-interaction computer model to investigate the effects of flow-separation-vortex-induced negative pressure on vocal fold vibration and flow dynamics during vocal fold vibration. The study found that negative pressure induced by flow separation vortices enhances vocal fold vibration by increasing aeroelastic energy transfer during vibration. The result showed that the intraglottal pressure was predominantly negative after flow separation before gradually recovering to zero at the glottis exit. When the negative pressure was removed, the vibration amplitude and flow rate were reduced by up to 20%, and the closing speed, flow skewness quotient, and maximum flow declination rate were reduced by up to 40%. The study provides insights into the complex interactions between flow dynamics, vocal fold vibration, and energy transfer during voice production.
本研究使用二维流固耦合计算机模型，以研究气流分离涡旋诱导的负压对声带振动以及声带振动过程中气流动力学的影响。该研究发现，气流分离涡旋诱导产生的负压通过增加振动过程中的气弹能量传递来增强声带振动。结果表明，声门内压力在气流分离后主要为负压，然后在声门出口处逐渐恢复至零。去除负压后，振动幅度和流速降低了多达20%，闭合速度、气流偏斜商和最大气流下降率降低了多达40%。该研究为语音产生过程中气流动力学、声带振动和能量传递之间的复杂相互作用提供了见解。
