ISSN Online: 2377-424X
International Heat Transfer Conference 5
BASIC STUDY ON VAPOR SUPPRESSION
Abstrakt
The condensation of steam jets in highly subcooled water was studied experimentally and theoretically. Steam was discharged downward into pool water through single straight nozzle. The length (height) of the vapor cone formed of continuous vapor phase was determined by photographs and temperature distributions. It increased 0.4 ~ 2.5×d (d: nozzle diameter) with steam velocity at the nozzle exit, 120 ~ 640 m/s. The angles of divergence of jets were about 20° ~ 40°. A turbulent diffusion model was proposed that the length of vapor cone was calculated from turbulent diffusion of heat in the mixing zone between the vapor cone and the surrounding medium. Calculated results were agreeable to experimental values.