东南大学学报（英文版）2007，Vol.23Issue(4)：609-614,6.
高压浓相粉煤气力输送特性及信息熵分析
Flow characteristics and Shannon entropy analysis of dense-phase pneumatic conveying under high pressure
摘要
Abstract
Experiments of dense-phase pneumatic conveying of pulverized coal using nitrogen are carried out in an experimental test facility with the conveying pressure up to 4. 0 MPa and the gas-solid ratio up to 450 kg/m3. The influences of different conveying differential pressures, coal moisture contents, gas volume flow rates and superficial velocities on the solid-gas ratios are investigated. Shannon entropy analysis of pressure fluctuation time series is developed to reveal the flow characteristics. Through investigation of the distribution of the Shannon entropy under different conditions, the flow stability and the evolutional tendency of the Shannon entropy in different regimes and regime transition processes are discovered, and the relationship between the Shannon entropy and the flow regimes is also established. The results indicate that the solid-gas ratio and the Shannon entropy rise with the increase in conveying differential pressure. The solid-gas ratio and the Shannon entropy reveal preferable regularity with gas volume flow rates. The Shannon entropy is different for different flow regimes, and can be used to identify the flow regimes. Both mass flow rate and the Shannon entropy decrease with the increase in moisture contents. The Shannon entropy analysis is a feasible approach for researching the characteristics of flow regimes, flow stability and flow regime transitions in dense-phase pneumatic conveying under high pressure.关键词
气力输送/高压/浓相/固气比/Shannon信息熵Key words
pneumatic conveying/high pressure/dense-phase/solid-gas ratio/Shannon entropy分类
化学化工引用本文复制引用
赵长遂,梁财,陈晓平,蒲文灏,鹿鹏,范春雷..高压浓相粉煤气力输送特性及信息熵分析[J].东南大学学报（英文版）,2007,23(4):609-614,6.基金项目
The National Basic Research Program of China(973 Program) (No. 2004CB217702-01), the Foundation of Excellent Ph. D. Thesis of Southeast University. （973 Program）
