FLOW CHARACTERISTICS AND DYNAMIC BEHAVIOR OF DENSE-PHASE PNEUMATIC CONVEYING OF PULVERIZED COAL WITH VARIABLE MOISTURE CONTENT AT HIGH PRESSURE
INTRODUCTIONGas-solid two-phase flow systems have been successfully used in the chemical and industrial processes. One typical example is the pneumatic conveying of materials. Many valuable achievements on characteristics of pneumatic conveying have been obtained. Generally, many of these systems mainly work at low pressure. Pneumatic conveying at high pressure and with variable moisture content in particles is infrequently reported 1-5. It is well known that the pressure drop signal contains sufficient information on peculiar features of a gas-solid two-phase flow such as the flow characteristic, the regime, the particle property and the energy exchange5-7. In this research Shannon entropy was applied to analyze flow characteristics of dense-phase pulverized coal pneumatic conveying at high pressure. Shannon entropy is a measurement of the information content or complexity of measurement series, which has been used widely in natural science research fields since the twentieth century. In pneumatic conveying, different flow characteristics should contain different amounts of information. Pressure fluctuation time series at different operation conditions carry the information of dynamic behavior. Thus, it is promising to grasp the characteristics of complex gas-solid two-phase flow in dense-phase pneumatic conveying at high pressure with Shannon entropy analysis of pressure fluctuation time series.
LIANG Cai CHEN Xiaoping ZHAO Changsui PU Wenhao LU Peng ZHOU Yun
The Thermoenergy Engineering Research Institute, Southeast University, Nanjing 210096, Jiangsu China
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
75-76
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）