Pressure-velocity correlations in a scaled-up vocal fold model – divergent cases

This study examines more complex flows in the scaled-up vocal fold model described in Ringenberg, et al (APS-DFD 2018). Specifically, cases where the vocal fold models do not completely close or only one vocal fold moves are examined. Simultaneous time resolved measurements of pressure, along the centerline, and DPIV, at the mid-plane, were made for a range of frequencies and Reynolds numbers characteristic to male and female voice. For the case where the vocal folds do not close, there are significant differences owing to the fact that the full pressure drop between the upstream and downstream sides of the vocal folds does not develop. The effects of one stationary and one moving vocal fold are manifest more in asymmetries than differences in fluid forces throughout the oscillation cycle. Effects on lateral force and the phase relationships between flow and pressure will be examined.