3.4 管子磨损率的空间分布如前所述,管子的磨损率沿周向和轴向都是不均匀的。对于管子破裂有实际影响意义的应该是最大的局部磨损率而不是平均磨损率。因此,了解磨损率在空间的分布形式是十分必要的。我们对黄铜管和铝合金管分别进行了磨损率沿周向和轴向分布的实验研究,除试样被切割成圆弧段之外,其余条件均保持与基本操作工况相同。即表观气速与最小流化速度之差为 3.4 pipe wear rate of the spatial distribution As mentioned earlier, the pipe wear rate along the circumferential and axial are not uniform. The actual effect on tube rupture should be the largest local wear rate rather than the average wear rate. Therefore, it is necessary to understand the spatial distribution of the wear rate. We conducted an experimental study on the wear rate of brass tube and aluminum alloy tube in the circumferential and axial directions, respectively. Except that the sample was cut into circular arcs, the remaining conditions were the same as the basic operating conditions. The difference between the apparent air velocity and the minimum fluidization velocity is