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根据非稳态传热学原理,通过对大试样进行单侧加热,另一侧喷水的实验方法,对连铸二冷段喷嘴的热态性能进行了实验研究。根据实际生产条件,对不同喷水压力和不同喷水距离下,喷嘴传热系数关系进行了研究;实验结果表明:相同实验条件下,水喷嘴的传热系数高于气水喷嘴,而在均匀冷却方面,气水喷嘴更具有优势;无论哪一种喷嘴,随着喷水压力的增加,总体趋势传热系数都在增大,而随着喷水距离的增加,传热系数都在降低;同时,相同实验条件下,双喷嘴的冷却效果优于单喷嘴的冷却效果。
According to the principle of unsteady heat transfer, the thermal performance of the nozzle in the second-stage continuous casting was experimentally studied by means of unilateral heating of large sample and water spray on the other side. According to the actual production conditions, the relationship between nozzle heat transfer coefficient under different water pressure and different water jet distance was studied. The experimental results show that under the same experimental conditions, the heat transfer coefficient of water nozzle is higher than that of gas-water nozzle, In terms of cooling, gas-water nozzles have more advantages. No matter which kind of nozzle, with the increase of water pressure, the overall trend of heat transfer increases, while the heat transfer coefficient decreases with the increase of water jet distance. At the same time, under the same experimental conditions, the cooling effect of double nozzle is better than that of single nozzle.