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Updated: Jun 3, 2026

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
Published on: February 3, 2014
Impact of wall rotation on supraglottal jet stability in voiced speech
Byron D Erath1, Michael W Plesniak
1Department of Mechanical and Aerospace Engineering, The George Washington University, 801 22nd Street Northwest, Washington, DC 20052, USA. erath@gwu.edu
Abstract:
Supraglottal jet variability was investigated in a scaled-up flow facility incorporating driven vocal fold models with and without wall rotation. Principle component analysis was performed on the experimental supraglottal flow fields to ascertain the roll of glottal wall motion on the development of the supraglottal jet. It is shown that intraglottal flow asymmetries that develop due to wall rotation are not the primary mechanism for generating large-scale cycle-to-cycle deflection of the supraglottal jet. However, wall rotation does decrease the energy content of the first mode, redistributing it to the higher modes through an increase in unstructured flow variability.
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