气垫炉中铜带材漂浮行为的数值模拟

Numerical simulation on floating behavior of copper strip in air cushion furnace

基于东北大学轧制技术及连轧自动化国家重点实验室中试气垫炉的试验数据和几何模型,采用Ansys Fluent软件构建了气垫炉漂浮仿真模拟平台,分析了气垫炉入口风量、带材漂浮高度、流体温度和喷嘴结构对铜带材漂浮行为的影响。结果表明,带材漂浮高度在H=80~180 mm范围内有利于带材稳定漂浮;温度越高,带材所受压力降低,增大入口风量对压力的提升效果减弱;高温条件下,出现风机功率波动时对带材压力影响较小,有利于带材稳定漂浮;狭缝喷嘴倾斜角度由30°优化为60°有利于改善带材压力分布均匀性,但会降低带材所受压力。

Based on the experimental data and geometric model for the experimental air cushion furnace from the State Key Laboratory of Rolling Technology and Continuous Rolling Automation of Northeastern University, the Ansys Fluent software was used to construct the air cushion furnace floating simulation platform, and the effects of air cushion furnace inlet air volume, strip floating height, fluid temperature and nozzle structure on the copper strip floating behavior were analyzed. The results show that the floating height of the strip is conducive to the stable floating of the strip in the range of H=80-180mm. The higher the temperature, the lower the pressure of the strip, and the increase in the inlet air volume weakens the pressure lifting effect. Under high temperature conditions, the possible fan power fluctuations have little effect on the strip pressure, which is conducive to stable floating of the strip. The optimized inclination angle of the slit nozzle from 30° to 60° is conducive to improving the uniformity of strip pressure distribution, but will reduce the pressure on the strip.