根据边界层动量积分方程结合拱区模化试验整理的拱区速度分布特性 ,对火床炉后拱面摩擦阻力进行了理论推导 ,得出了计算表达式。实例计算表明 ,火床炉后拱区内最大静压差主要由汇流过程中势流区的动静压转换所致 ,壁面摩擦阻力损失与之相比 ,完全可以忽略不计。同时 ,该文也为炉拱结构趋向小型化提供了空气动力方面的理论依据。图 1表 1参 4 According to the momentum integral equation of boundary layer combined with the velocity distribution characteristics of arch area simulated by arch test, the frictional resistance of the rear arch surface of fire bed furnace is theoretically deduced, and the calculation expression is obtained. The calculation example shows that the maximum static pressure difference in the rear arch area of ​​the fire bed is mainly caused by the conversion of the static pressure and static pressure in the potential flow area in the confluence process. The frictional resistance loss of the wall is totally negligible. At the same time, the article also provides the aerodynamic theoretical basis for the miniaturization of the furnace arch structure. Figure 1 Table 1 reference 4