【摘要】 根据实验数据,提出了计算小直径固定床的有效导热系数λer和壁传热系数α_w的三种方法。 实验结果指出λ_eλ和α_w与Re_p·Pr呈线性关系,其斜率取决于d_p/d_t。由实验还可得到:在较高温度下,床层的平均温度对线性关联式的截距的影响更显著。更多还原

【Abstract】 Three methods are derived for calculating the effective thermal conductivity λ_or and the wall heat transfer coefficient α_w of fixed bed of small diameter from experimental data. The experimental results for λ_or and α_w are correlated as linear functions of Re_po. Pr, the slopes of which dopend on （d_p/d_s）. It is also shown that at higher temperature, the influence of average temperrature of the bed on the intercepts of these linear correlations are considerable.更多还原