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首页> 外文期刊>Water >Experimental Investigation on Air-Water Interaction in a Hydropower Station Combining a Diversion Tunnel with a Tailrace Tunnel
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Experimental Investigation on Air-Water Interaction in a Hydropower Station Combining a Diversion Tunnel with a Tailrace Tunnel

机译：引水隧洞与尾水隧洞相结合的水电站中空气与水相互作用的实验研究

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摘要

Diversion tunnels are often used as tailrace tunnels in underground hydropower stations. The special layout results in complex flow regimes, including air-water two-phase flow. A set of experiments is conducted based on the model of a hydropower station which combines partial diversion tunnels with tailrace tunnels to investigate the interactions between the air and water phases in the combined diversion tunnels. Interactions between the air and water phases observed in the combined diversion tunnel significantly alter flow dynamics, and are classified into four types according to the initial tail water level. There is a range of initial tail water levels in which the interaction between the air and water phases cannot be neglected, and the range becomes greater when the change in flow rate increases. Such interactions may cause a pressure surge and the pressure surge reaches the maximum when the initial tail water level is approximately equal to the crown of the tunnel. The surge pressures do harm to the safety and stability of hydropower stations, so the condition should be considered and controlled.
机译：引水隧洞通常用作地下水电站的尾水隧洞。特殊的布局导致复杂的流动状态，包括空气-水两相流。基于水电站模型进行了一组实验，该模型将部分引水隧洞与尾水隧洞相结合，以研究组合引水隧洞中水相和水相之间的相互作用。在组合分流隧道中观察到的空气和水相之间的相互作用显着改变了流动动力学，并根据初始尾水位将其分为四种类型。在初始尾水位的范围内，不能忽略空气和水相之间的相互作用，并且当流速变化增加时，范围会变大。当初始尾部水位大约等于隧道的顶部时，这种相互作用可能会引起压力波动，并且压力波动达到最大值。浪涌压力确实会损害水电站的安全性和稳定性，因此应考虑和控制这种情况。

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