论文部分内容阅读
应用脉冲应答技术,研究了细直径管内纤维床层中的气体轴向扩散,使用的气体是N_2、H_2、He、Ar和空气。流速变化范围为0.01～20cm/sec。与小粒子床层一样,使用矩量法计算的轴向扩散系数也可以近似地用Burger型方程■来关联。对纤维床层,获得的扩散能力η=1.0,■散尺度ι=3.0mm。如果以U_0/D≈0.35mm~(-1)为界,用Burger型方程的两条直线来分别关联纤维床层中不同流速范围的轴向扩散系数时,其结果比用一个方程更接近于实验值。
The application of impulse response technique was used to study the axial gas diffusion in the thin fiber tube. The gas used was N 2, H 2, He, Ar and air. The flow rate varies from 0.01 to 20 cm / sec. As in the case of small particle beds, the axial diffusion coefficient calculated using the moment method can also be approximated by the Burger-type equation ■. For the fiber bed, the diffusibility η = 1.0 obtained, ■ Smaller dimension ι = 3.0 mm. If we use the two straight lines of Burger-type equation to relate the axial diffusion coefficients of different flow velocity ranges in the fiber bed with U_0 / D≈0.35mm -1 as the boundary, the result is more approximate than using an equation Experimental value.