【摘要】 基于流体力学伯努利方程推导了浸入式水口的流量计算式，基于相似理论设计了水模型试验装置，研究了中间包水头高度和塞棒开口度对水口流量的影响，确定了塞棒开口度与流量系数的关系，确认了流量系数是开口度的函数并随开口度增大而增大。分析某厂实际水口浇注过程实测数据，验证了其流量系数与塞棒开口度的关系，进而建立了开浇过程控制模型，得到了开浇控制曲线。通过现场开浇试验，验证了该方法的准确性。更多还原

【Abstract】 Based on the Bernoulli equation of fluid mechanics, the flow calculation formula of submerged nozzle was derived, and a water model experimental device was designed based on the similarity theory. Effects of head height of tundish and opening degree of stopper-rod on nozzle flow were investiagted, and the relationship between opening degree and flow coefficient was determined. It is confirmed that the flow coefficient is a function of opening degree, which is increased with the opening degree. On this basis, the actual pouring process data of a plant was analyzed, and the relationship between flow coefficient and opening degree was verified. The control model of start-up was established, and the control curve was given. The accuracy was verified by the on-site pouring experiment.更多还原