Abstract
Near-wall liquid film outflow accompanied by high-velocity (up to 317 m/s) gas flow from a nozzle into vacuum is studied experimentally. Governing influence of Reynolds and Weber numbers of co-current gas flow on local parameters of the film and the amount of liquid carried away from the interphase boundary is established. Flow structure of droplet phase in vacuum behind the nozzle exit cross-section is investigated. Appearance of central and peripheral areas of flow with distinct characters is shown. Influence of liquid physical properties and pressure in vacuum chamber on minimal temperature of liquid film formed on the external surface of the nozzle under outflow into vacuum is elucidated.
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