Definition of film cooling in English:

film cooling

noun

  • 1A form of evaporative cooling in which the coolant is distributed as a thin film on a surface to increase the rate of evaporation.

  • 2A technique by which an object (typically a turbine or part of an engine) is protected from the heat of its surroundings by an enveloping film of insulating gas.

Origin

Early 20th century; earliest use found in Engineer-in-charge.