X-Ray Fluoroscopy Observation of Bubble for Its Formation and Motion in Liquid Steel Borate and Silicate Systems
Size,shape,speed and trajectory of a single argon bubble rising through a finite stagnant liquid steel were investigated experimentally.A high power X-Ray fluoroscope(X-Ray source of 300kV to 450kV)coupled with a high speed camera was used in order to track the rising bubble in liquid steel.Inner space of crucible was restricted to be less than 25mm due to the penetration limit of X-Rays through the liquid steel and height of the liquid steel contained in the crucible was 100mm.After post-processing of X-Ray images including suitable calibration,it was observed that the formed bubble grew around the outer surface of the nozzle.The bubble size expanded as large as about 11.5mm when gas flow rate was from 4.9 to 12.7ml/s.The aspect ratio of bubble was about 0.85 and wobbled when it was rising.From the images of bubble movements taken for the very short time of 0.008 sec,it was able to derive a local bubble rising velocity,and it was subsequently used to estimate the terminal bubble rising velocity.The finding of bubble formation and motion in liquid steel is expected to refine the accuracy of multiphase flow computational fluid dynamic simulations.
X-ray bubble formation bubble motion liquid steel
In-Beom PARK Sang-Joon KIM Hae-Geon LEE Youn-Bae KANG
Graduate Institute of Ferrous Technology,Pohang University of Science and Technology,Pohang,Rep.of K Graduate Institute of Ferrous Technology,Pohang University of Science and Technology,Pohang,Rep.of K School of Engineering,Adama Science and Technology University,Adama,Ethiopia
国际会议
the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)
北京
英文
885-888
2015-05-12（万方平台首次上网日期，不代表论文的发表时间）