不同声带长度的声门管内流场数值模拟

Numerical Simulation of the Glottal Flow Field with Different Lengths of Vocal Cord

摘要: 为了探究不同声带长度下声门管内压力场分布情况，运用有限元分析方法建立三种不同声带长度模型，并对模型分别设置5种声门直径(0.01 cm、0.02 cm、0.04 cm、0.08 cm、0.16 cm)和3种声门下压(500 Pa、1000 Pa、1500 Pa)，利用ANSYS Fluent对声门管内流场进行数值模拟得出其压力场分布情况。实验结果表明，较长的声带长度会降低声门入口处的压力降，从而更有利于声带振动并减小发声阈值压力，为进一步研究人体声带发声机理和损伤声带修复提供参考。

Abstract: In order to investigate the distribution of pressure field in the glottal duct with different vocal cord lengths, three different glottal models were established by using finite element analysis method. Five different glottal diameters (0.01 cm, 0.02 cm, 0.04 cm, 0.08 cm, 0.16 cm) and three kinds of subglottal pressure (500 pa, 1000 pa, 1500 pa) were set up in the model respectively. The pressure distribution is obtained by numerical simulation of the flow field by ANSYS Fluent. The experimental results show that the longer glottal length will reduce the pressure drop at the en-trance of the glottal, which helps make it easier to create vibration of the vocal folds and reduces the phonation threshold pressure, and provide reference for further study of the vocal mechanism of human vocal cords and the repair of damaged vocal cords.