基于振荡流的气固两相流流动特性分析  

Analysis of the characteristics of gas-solid two-phase flow based on oscillating flow

作　　者：王涌锂 董林 WANG Yongli;DONG Lin(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201600

出　　处：《河南科技学院学报（自然科学版）》2023年第3期43-54,共12页Journal of Henan Institute of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金(12002199)。

摘　　要：针对气力输送系统的节能运输需求,提出了几种固定在管道入口的软翅和方形柱体支撑器组合使用的模型来产生振荡尾流以研究粒子,通过架设气力输送平台试验研究了气固两相流中的压降、功率消耗、最小输送速度、颗粒速度分布以及颗粒脉动速度.采用平均直径和密度为2.3 mm和978 kg/m^(3)的圆柱形聚乙烯颗粒作为固体材料,平均气体速度和固体质量流量的试验,范围分别为10~16 m/s和0.10 kg/s、0.25 kg/s与0.47 kg/s.优化的振流结构为方形柱体支撑器加上软翅片,最后调整方形柱体支撑器的尺寸进行多组对比试验.通过与正常运输模式比,最小输送速度的最高降低率分别为6.54%、6.25%和6.41%.这也说明了振荡流运用到气力输送系统中的有效性.In order to meet the demand of energy saving transportation in pneumatic conveying system,several models of soft fin and square column support fixed at the inlet of pipeline are proposed to generate oscillating wake to study the particles.The pressure drop,power consumption,minimum conveying velocity,particle velocity distribution and particle pulsation velocity in gas-solid two-phase flow were investigated by setting up pneumatic conveying platform.Cylindrical polyethylene particles with an average diameter and density of 2.3 mm and 978 kg/m^(3) were used as solid materials.The test ranges of average gas velocity and solid mass flow were 10~16 m/s,0.10 kg/s,0.25 kg/s and 0.47 kg/s,respectively.The optimized vibrator structure is a square column support with soft fins.Finally,the size of the square column support is adjusted to carry out multiple group comparison tests.Compared with the normal transport mode,the maximum reduction rates of the minimum transport speed are 6.54%,6.25%and 6.41%,respectively.It also shows the effectiveness of oscillating flow in pneumatic conveying system.

关 键 词：气力输送 振荡尾流 气固两相流 压降 节能 

分 类 号：TH48[机械工程—机械制造及自动化]