CAJ | 학술논문

提出了一种鼓泡塔二维轴对称流体力学模型，模型中将气泡所受的升力以及湍动扩散力作为形成塔内气含率稳定分布的主要机制。采用Fluent 6.3流体力学软件求解模型，能得到稳定的二维流场，气含率与液速分布与实验值吻合良好，模型能准确反映表观气速（0.12～0.62 m·s-1）以及塔径（?200 mm、?500 mm、?800 mm）对流型的影响。利用该模型对更大直径鼓泡塔的流动参数进行了预测，结果与文献给出的经验关联式相符。
제출료일충고포탑이유축대칭류체역학모형，모형중장기포소수적승력이급단동확산력작위형성탑내기함솔은정분포적주요궤제。채용Fluent 6.3류체역학연건구해모형，능득도은정적이유류장，기함솔여액속분포여실험치문합량호，모형능준학반영표관기속（0.12～0.62 m·s-1）이급탑경（?200 mm、?500 mm、?800 mm）대류형적영향。이용해모형대경대직경고포탑적류동삼수진행료예측，결과여문헌급출적경험관련식상부。
A 2-D axisymmetric hydrodynamic model of bubble column was developed, by considering lift force and turbulent dispersion force on bubbles as main mechanism of stable distribution of gas holdup. A commercial code Fluent 6.3 was used for calculation, and the model gave a stable 2-D flow pattern, in which distributions of gas holdup and liquid velocity were in good agreement with experimental data. The model correctly demonstrated the influence of superficial gas velocity (0.12-0.62 m·s-1) and column diameter (?200 mm,?500 mm,?800 mm) on flow pattern. Furthermore, hydrodynamic variables predicted by the model in larger scale columns agreed with published empirical correlations.