以下为句子列表：
英文: The influence of the area contraction ratio of rotary flow generator on the hydraulic characteristics of level rotary flow has been investigated by the hydraulic model test of an internal energy dissipation tunnel.
中文: 摘要通过模型试验，研究了起旋器出口面积收缩率对水平旋流泄洪洞水力特性的影响。
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