In order to better reflect the actual heat transfer process, the heat transfer process of the gas jet matrix impact cooling strip steel was studied by the experimental method, and investigated the effects of jet Reynolds number Re, dimensionless nozzle spacing Χn/D (the ratio of the orifice spacing to the orifice diameter), dimensionless jet height H/D (the ratio of strip to orifice distance to orifice diameter) on forced convection heat transfer coefficient. Finally, the empirical formula of Nu is fitted basing on the experimental results. In order to study the strip jet cooling more comprehensively, combined with the experimental results, a one-dimensional unsteady heat transfer model was established for the cyclic spray cooling heat transfer of strip steel protective atmosphere, calculated the temperature field of strip steel by finite difference numerical calculation method, The results show that there is a maximum operating speed for strip steel of different thicknesses on the premise of meeting the performance requirements and safety; The larger Η/D or Χn/D, the higher outlet temperature of strip steel, and the increase rate of strip steel outlet temperature will decrease with the increase of Η/D and Χn/D; As the temperature of the cooling medium increases by 10 °C, strip steel outlet temperature increases by about 5 °C. When the volume percentage of hydrogen in the cooling medium and the flow rate of the cooling medium increase, the temperature of strip steel outlet will decrease, however, the rate of decrease will gradually decrease. The industrial application results showed the calculated value of the outlet temperature of strip steel agrees well with the measured value, and the error is about 2.78%, which means that the model meets the application requirements.

为了更好地反映实际的传热过程，通过实验方法研究了气体喷射基体冲击冷却带钢的传热过程，研究了射流雷诺数Re，无量纲喷嘴间距Χn/ D（比值）的影响。孔间距与孔直径的关系），无因次射流高度H / D（带对孔的距离与孔直径的比）对对流换热系数的影响。最后，Nu的经验公式根据实验结果进行拟合。为了更全面地研究带钢的射流冷却，结合实验结果，建立了带钢保护气氛的循环喷雾冷却传热的一维非稳态传热模型，通过有限差分计算了带钢的温度场。数值计算方法，结果表明，在满足性能要求和安全性的前提下，不同厚度的带钢具有最大的运行速度。较大Η/ d或χN/ d，带钢的较高的出口温度，和增大率带钢出口温度会随着增加而减小Η/ d和χN/ d; 随着冷却介质温度升高10°C，带钢出口温度升高约5°C。当冷却介质中氢的体积百分比和冷却介质的流量增加时，带钢出口的温度将降低，但是，降低率将逐渐降低。工业应用结果表明，带钢出口温度的计算值与实测值吻合较好，误差约为2.78％，说明该模型符合应用要求。