Abstract
The behavior of rewetting on a high superheated and dry surface, focusing on rewetting temperature just as collapse of saturated and subcooled film boiling was investigated experimentally Saturated and subcooled impingement jet experiments were conducted by using a silicon wafer and a silver plate with 41.5 X 41.5 mm (length X width) and pure water at atmospheric condition. Temperature of the test heater was measured by using a commercial separated-type infrared thermometer from a back side of it. The MHF-temperature and the film-boiling heat transfer coefficient under saturated and subcooled impingement jet were obtained quantitatively from the present experiments. The sputtering temperature, i.e, rewetting initiation temperature, was close to the value given by Nishio's correlation, 200℃, in spite of liquid velocity and liquid subcooling.
