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针对异断面浇注,即同一板坯双流中间包内浇铸时,各流拉速和断面不同,生产不同规格铸坯的问题,采用用粒子成像测速技术(Particle Image Velocimetry,PIV)研究了钢液在中间包、结晶器水模型中的流场行为。根据PIV流场测速结果表明:断面尺寸差为200 mm时,中间包两流浇铸区平均流动速度相差约5.83%、最大速度相差约1.22%,结晶器流场差异不大,可进行异断面浇铸;断面尺寸差为1 100 mm时,中间包两流浇铸区流场速度差异最大约为50%,两流结晶器射流区平均速度、钢液冲击深度、涡心高度差异较大,不利于两流浇铸一致性,不建议进行异断面浇铸。
Aiming at the problem of different cross-section casting, that is, when casting in the same twin-tundish tundish, the flow velocity and the cross section of each flow are different and different size slabs are produced, Particle Image Velocimetry (PIV) Tundish, mold water flow model behavior. According to the results of PIV flow field velocity measurement, the average flow velocity of two-zone casting zone differs about 5.83% and the maximum velocity difference about 1.22% when the sectional size difference is 200 mm. The flow field in the mold is not significantly different, ; When the cross-sectional dimension difference is 1 100 mm, the difference of the flow field velocity in the two-way casting zone is about 50%, the difference between the average velocity in the jet zone of the two-way mold, the impact depth of molten steel and the height of the vortex center is not good Stream casting consistency, not recommended for casting different surface.