The flow characteristics in a meander channel are fully three-dimensional. With the primary flow in the streamwise direction, the secondary flow in the transverse and vertical directions induced by the channel bends are significant in the analyses of the turbulent structure. Some of the analyses in the straight channel, for instance, the quadrant analysis for the bursting phenomena, are inadequate in investigating the meander channel, since the flow in the transverse direction is not taken into account. In order to reveal the flow characteristics in a multi-bend meander channel, especially, the bursting process, experiments are conducted in the present study. With the three-dimensional quadrant analysis, the influence of the transverse flow velocity during the bursting process could be correctly addressed. The analyses and discussions are presented in this paper.

中文翻译：

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多弯曲河道湍流结构及破裂过程

弯曲通道中的流动特性完全是三维的。在沿水流方向的主要流动中，由通道弯曲引起的沿横向和垂直方向的次要流动在湍流结构分析中非常重要。由于未考虑横向流动，因此直通道中的某些分析（例如，爆裂现象的象限分析）不足以研究曲折通道。为了揭示多弯曲河道中的流动特性，特别是爆破过程，在本研究中进行了实验。通过三维象限分析，可以正确解决爆破过程中横向流速的影响。