水煤浆流经局部管件阻力特性研究

摘要

By analyzing the resistance characteristics of coal-water slurry flows through the local pipe fittings, applying dimensional analysis to get resistance criterion and to compute the resistance loss of coal-water slurry flows through the different contracting and sudden contraction tube. The paper comes to an conclusion that local loss coefficient descends and gradually becomes steady when reynolds increases. Adopting the relationship of the pressure drop ratio and Reynolds to show that resistance characteristics of coal-water slurry flows different curvature radius and diameters and to indicate that the loss ascribes to irregular flow and axis length.%通过对水煤浆在局部管件中的流动阻力特性分析,采用量纲分析方法得出阻力准则式,用于计算水煤浆流经不同的渐缩管道以及突缩管道的阻力损失,并得出随着流速的增加渐缩段和突缩阻力损失系数逐渐 降低,最后趋于稳定.采用压降比与广义雷诺数的关系说明水煤浆流经不同弯曲率、不同管径弯管时的阻力特性,指出弯管段的阻力损失主要是由不规则流动和弯管轴线加长共同作用的结果.