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Measurement of Pressure Fluctuations in Two-Dimensional Gas-Solid Fluidized Beds at Elevated Temperatures

机译:二维气固流化床中高温下压力波动的测量

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References(21) Cited-By(9) Pressure fluctuations were measured in a two-dimensional gas-solid fluidized bed at temperatures ranging from 13 to 270°C. The random pressure fluctuation signals were studied on-line by the statistical method. The results indicate that the frequency spectrum, major frequency, and mean pressure amplitude depend considerably on the gas excess velocity and temperature. A probability density function of pressure fluctuations with two peaks was observed in the upper portion of the bed, indicating bubble eruption behavior at room temperature. The two peaks in the p.d.f. are transformed into a single peak at higher temperature, and the location of maximum amplitude also changes at higher temperature. Both measurements of pressure drop fluctuations and differential pressure fluctuations were used in this study, and the latter were found to be superior in the study of bubble behavior.
机译:参考文献(21)引用(9)在二维气固流化床中,在13至270°C的温度范围内测量压力波动。通过统计方法对随机压力波动信号进行了在线研究。结果表明,频谱,主频率和平均压力幅度在很大程度上取决于气体过剩速度和温度。在床的上部观察到具有两个峰值的压力波动的概率密度函数,表明在室温下有气泡喷出。 p.d.f.中的两个峰在较高温度下被转换成单个峰,并且在较高温度下最大振幅的位置也发生变化。在这项研究中使用了压降波动和压差波动的两种测量方法,发现后者在气泡行为的研究中是比较好的。

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