Formation and evaporation of near-wall fluid films under expansion from a nozzle to the vacuum

Expansion of near-wall films of liquids with different physical properties accompanied by high-velocity co-current gas flow from a nozzle into vacuum is studied experimentally. Local parameters of liquid films inside the nozzle are measured. Gas-droplet flow structure behind the nozzle exit cross-section is examined. Limiting temperatures of liquid films formed on the nozzle outer surface are measured.