水平管道细粉高浓度分层流动阻力特性的试验研究

Experimental Research of the Resistance Characteristics of High-concentration Fine Powder Stratified Flow in a Horizontal Pipe

高浓度粉体输送由于人们对其优越性认识的深入而得到了广泛的研究。水平管内分层流动是高浓度粉体输送流型中最重要的形式 ,研究其阻力特性有着重要的意义。本文通过对近 5 0年来在这一领域内工作的回顾 ,分析了不同学者所获得的经验公式的利弊。在一高浓度气力输送试验台上的试验 ,获得了水平管道细粉高浓度分层流动的阻力公式 ,误差分析认为 ,该公式能够满足一般工程设计要求。

With a progressively better understanding of the advantages of a high concentration fine powder conveying system the latter has recently become an object under extensive study by numerous scholars. A stratified flow in a horizontal pipe represents the most important form of high concentration powder transport flow. In view of this the study of its resistance characteristics is of great significance. On the basis of a review of their work in this area over the past fifty years the authors have analyzed the merits and demerits of empiric formulas presented by various scholars. Through a series of tests on a test rig of high concentration pneumatic conveying system, deduced is a formula for calculating the resistance characteristics of a high concentration fine powder stratified flow in a horizontal pipe. An error analysis indicates that the above mentioned formula can well meet the relevant requirements of general engineering design.