- 期刊
Fluid Flow and Inclusion Removal in Various FCD Designs of Slab Tundish of Continuous Casting Processes of Steel
鋼鐵連鑄製程之扁鋼胚鋼液分配器設計對流體流動與介在物移除現象之影響
摘要
本研究建構了一套基於SOLA-SURF與k-ε擾流模式的數學模式，探討不銹鋼單道式鋼液分配器的擋牆設計對鋼液流體流動、質傳現象與介在物移除效率的影響。本研究中也建構一套爲原尺寸1/3規模的壓克力水模，實際觀察與量測模擬鋼液分配器之流動現象與質傳現象，並以水模實驗的結果來驗證所建立的數學模式。測試的結果顯示數學模式與水模實驗的流動現象與質傳現象上均相當的吻合。驗證後的數學模式應用到現場的鋼液分配器，模擬不同擋牆設計下的流體流動與介在物移除現場。研究結果發現安裝衝擊磚(PP)可增加介在物上浮的機會，並且有最高的介在物去除效率，是最適合的擋牆設計。
並列摘要
A mathematical model, which is based on SOLA-SURF scheme and k-c two-equation model, has been developed to simulate the fluid flow and mass transfer phenomena as well as inclusion removal rate for a single-strand stainless steel continuous casting tundish under various designs of flow control devices (FCDs). A physical model, which is one-third the scale of the actual slab continuous casting tundish, has also been constructed to directly observe/measure the fluid flow and mass transfer phenomena. The experimental observations/measurements are also used to validate the mathematical model. Satisfactory consistency is found when the simulated results are compared to the experimental ones. The verified mathematical model is then applied to the actual slab continuous casting tundish to evaluate the effects of the FCD design on the fluid flow/mass transfer phenomena and inclusion removal rate. It is found that the incorporation of a pouring pad (PP) underneath the long nozzle can enhance the opportunity for the inclusions to float and achieves the highest removal rate of inclusions among the four FCD designs evaluated.