Vortex formation in a model glottal jet

This talk presents vortex formation timing in a model glottal jet, using DPIV measurements previously presented of the flow through a scaled-up model of the human glottis. The range of reduced frequency of vibration was 0.01-0.04 and the Reynolds number 8000. The jet issuing from the glottis is generally symmetrical and is characterized by the formation of vortex pairs along the jet. The data shows that the vortex formation time is not a strong function of reduced frequency of vibration, but that the vortex strength is. Furthermore, during periods of strong flow acceleration and deceleration, the timing is less regular.