【摘要】 运用小波能谱分析中的能量最大准则,对双头电导探针前针在单孔鼓泡口测得的时间序列进行了分析,并用最大尺度强度考察了液体性质和鼓泡口直径对鼓泡过程的影响。结果表明:单孔鼓泡过程,随着雷诺数的增加分为低频鼓泡、过渡鼓泡和高频鼓泡3个过程;最大尺度强度随雷诺数增加不是严格意义上的单调递减,在雷诺数约为1600左右时出现了一极值点;液体粘度增加会使最大尺度强度相应增加而鼓泡口直径主要影响高雷诺数下的最大尺度强度。更多还原

【Abstract】 The time-series data measured by double-sensor conductivity probe in a single orifice bubble column was analyzed using an energy maxima criterion of wavelet energy spectrum. The effects of liquid property and orifice diameter on bubbling were investigated using maximal scale intensity. The bubbling process had three stages as the Reynolds number increased: low-frequency bubbling, transition bubbling and high-frequency bubbling. The maximal scale intensity increased with increasing liquid viscosity, while the orifice diameter affected only the value of maximal scale intensity at a high Reynolds number.更多还原