【摘要】 针对热轧生产中因热轧辊冷却不充分且不均匀而导致磨损严重的问题，本文采用VOF多相流和k-ε湍流模型研究冷却喷嘴的流场特性并进行结构优化。通过建立喷嘴腔室和外流场的气液两相流模型，对常用的平口喷嘴、扇形喷嘴、锥形喷嘴的流场进行了仿真分析。结果表明，这三种射流喷嘴传热性能各有优势，其中扇形喷嘴具有耗能小、冷却能力强和冷却均匀的综合性能。基于此，对扇形喷嘴进行了结构优化，通过改变扇形喷嘴结构参数设置了仿真对照实验。更多还原

【Abstract】 Addressing the severe wear caused by insufficient and uneven cooling of hot rollers in hot rolling production, the flow field characteristics and structural optimization of cooling nozzles were studied using the VOF multiphase flow and k-ε turbulence models. By establishing a gas-liquid twophase flow model for the nozzle chamber and external flow field, simulation analysis was conducted on the flow fields of commonly used flat nozzles, fan nozzles, and conical nozzles. The results indicated that these three types of jet nozzles each have their advantages in terms of heat transfer performance, with the fan nozzle exhibiting comprehensive performance characterized by low energy consumption, strong cooling capacity, and uniform cooling. Consequently, structural optimization was carried out on the fan nozzle, and simulation control experiments were set up by altering the structural parameters of the fan nozzle.更多还原