摘要
在1∶1的试验台上采用粉煤灰、水泥两种不同粉体作为输送物料,压缩空气作为输送动力进行了气固输送试验,在试验基础上得出了密相气固两相流动特性及阻力特性的变化规律。试验结果表明,在发送压力基本保持不变的情况下,随气体表观速度的增大,固体质量流率、固体速度增大,而阻力损失减小;同时考察了物料特性对输送性能的影响。利用根据力平衡原理建立的料栓平衡方程式并结合试验数据得出了预测栓流运动压力损失的公式。误差分析表明,该公式具有良好的精度。
The pneumatic conveying and multifunctional experimental apparatus has been built to study the flow characteristics and resistance of dense-phase gas-solid two phase flow in conveying pipeline. Systematic experiment in which compressed-air ,fly ash and cement are working medium are carried out to explore the law of flow characteristics and resistance characteristics . The experimental result show on condition that the systemic operation pressure keep to a constant value, when the gas velocity begin to be more and more, the solid mass flow rate and solid velocity increase while the unit length pressure drop of the pipe gradually declines. Meanwhile ,the influence of material performance is described. A pressure drop calculating equation of slug flow is achieved ,which is based on the experimental data and the principle of force equilibrium. Error analysis shows this equation has a good agreement with experiment data.
出处
《流体机械》
CSCD
北大核心
2008年第7期1-5,43,共6页
Fluid Machinery
基金
上海市科学技术委员会基金项目(03JC14055)
上海市教育委员会基金项目(05EZ15)
关键词
栓流
密相
流动特性
压力损失
slug flow
dense phase
flow characteristics
pressure drop
