Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 19, 2024 - November 20, 2024
A device that reproduces breathing was created. This device was composed of an electric actuator and an air cylinder. The change and distribution of flow velocity at the nozzle outlet under the flow rate and period conditions of human breathing at rest were investigated. As a result, it was found that the flow direction changes between discharging and suctioning, and that the flow velocity during suctioning is slower than the flow velocity during discharging. The shape of the velocity distribution was almost the same as that of a circular jet. The velocity waveform during discharging was almost the same as that was observed the row of puff in an intermittent jet. It was suggested, therefore, that a leading vortex and a trailing jet are formed when the flow was discharging.
