水平管内气—液两相泡状流的混沌特征  

Chaotic Characteristics of Gas-Liquid Bubbly Flow in the Horizontal Tube

作　　者：苏玉亮[1] 张鸣远[1] 杨健[1] 张超杰[1] 薛海晖[2] 

机构地区：[1]西安交通大学能源与动力工程学院,710049 [2]辽河油田特种油开发公司,124010

出　　处：《核科学与工程》2002年第2期161-165,共5页Nuclear Science and Engineering

基　　金：国家自然科学基金资助项目(59876032)

摘　　要：运用相空间重构法,对实验测得的局部空隙率信号时间序列进行处理,计算出水平管内气—液两相泡状流系统的局部空隙率信号的Kolmogorov熵和关联维数。计算结果表明,气—液两相泡状流系统具有非线性混沌现象;系统普遍存在2～3个分维;随着折算液速的增加,系统的混沌程度下降;Kolmogorov熵和关联维数沿径向的分布呈波动特征;在r/R=0.6～0.85区域,系统的混沌程度较高。Using the reconstructed phase space method, the Kolmogorov entropy and the correlationdimension of the local void fraction time-series data that were measured in a horizontal gas-liquid bubbly flow system have been calculated. The result shows that the system is chaotic and two to three non-integer correlation dimensions are found in the system. The chaos level decreases with increasing liquid superficial velocity, in addition, the Kolmogorov entropy and the correlation dimension fluctuate in radial direction, the chaos level of the system is relatively high in the region where r/R=0.6~ 0.85.

关 键 词：水平管 气-液两相泡状流 混沌特征 Kolmogorov熵 关联维数 局部空隙率 相空间重构法 

分 类 号：O359.1[理学—流体力学] O415.5[理学—力学]