中文摘要：

为研究通仓型进水口水力特性,探讨水电站最佳运行方案,结合某实际工程,建立了全三维水动力数学模型,并同步开展了大比尺物理模型实验,计算结果与实验结果进行了相互验证。对不同运行工况下通仓型进水口流速及水头损失等开展研究,结果表明：叠梁门顶流速分布受机组运行影响显著;与常规分层取水进水口相比,最大过栅流速降幅可达60%以上;分层取水进水口采用通仓型布置,其水头损失最大降幅达到50%左右。从水力特性出发,采用通仓型进水结构是降低进水口过栅流速,减小水头损失的有效办法,同时建议采用对称原则确定运行方案。

英文摘要：

A full three-dimensional flow model was developed in this work to investigate the hydraulic characteristics and optimal operation schemes of full length intakes of large hydropower stations. We also conducted physical model tests to validate the calculations. Comparison of flow velocity, head loss and other hydraulic behaviors showed that the velocity of flow over the top of stop log gates varied significantly under different operation schemes. Relative to the conventional intake, the peak velocity around the trash rack was decreased by up to 60% and a roughly 50% decrease in the total intake head loss was achieved. Thus, full length intakes are an effective device for velocity and head loss control, and symmetrical operation schemes are recommended by this study.