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通过数值模拟和物理模拟对优化后的三孔水口和传统的两孔水口进行分析对比,从而得出:三孔水口形成了上、中、下3个主要的回旋区,而两孔水口形成了两个回旋区;三孔水口的平均表面流速为1.07 m/s,相对两孔水口流速降低了将近28%,三孔水口的平均湍动能0.002 2,较两孔水口的湍动能降低了42%;三孔水口的波峰与波谷的最大差值为7.6 mm,周期为10 s,而两孔水口的波峰与波谷的最大差值为15.3 mm,周期为20 s。优化后的三孔水口较传统的两孔水口能更好的提高铸坯品质。
Through numerical simulation and physical simulation, the optimized three-hole nozzle and the traditional two-hole nozzle are analyzed and compared, and it is concluded that the three-hole nozzle forms three main circling regions of upper, middle and lower, and the two-hole nozzle forms The average flow velocity of the three-hole nozzle is 1.07 m / s, the flow velocity of the three-hole nozzle is reduced by nearly 28%, the average turbulence energy of the three-hole nozzle is 0.002 2, and the turbulent kinetic energy of the two-hole nozzle is reduced by 42% The maximum difference between the peak and trough of the three-hole nozzle is 7.6 mm and the period is 10 s, while the maximum difference between the peak and trough of the two-hole nozzle is 15.3 mm and the period is 20 s. The optimized three-hole nozzle can better improve the quality of the billet than the traditional two-hole nozzle.