Abstract
An experimental study has been performed to investigate the behavior of flowand mass transfer in gaseous slow jet in which buoyancy force opposed the flowforming stably stratified field. The study has been performed to understand thebasic features of air ingress phenomena at pipe rupture accident of the hightemperature gas-cooled reactor. A displacement fringe technique was adopted inMach-Zehnder Interferometer to visualize the mole fraction distribution. As theresult, the followings were obtained:
(1) The stably stratified fields were formed in the vicinity of the outlet of theslow bet. The penetration distance of the stably stratified fields increased with Froude number.
(2) Mass fraction distributions in the stably stratified fields were well correlatedwith the present model using the ramp mole velocity profile.
