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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >An Improved Empirical Model for Flood Discharge Atomization and Its Application to Optimize the Flip Bucket of the Nazixia Project
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An Improved Empirical Model for Flood Discharge Atomization and Its Application to Optimize the Flip Bucket of the Nazixia Project

机译：改进的泄洪雾化经验模型及其在纳子峡工程倒装斗优化中的应用

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摘要

Flood discharge atomization is a serious challenge that threatens the daily lives of the residents around the dam area as well as the safety of the water conservancy project. This research aims to improve the prediction accuracy of the stochastic splash model. A physical model test with four types of flip bucket is conducted to obtain the hydraulic parameters of the impinging outer edge of the water jet, the relationship of the splashing droplet diameter with its corresponding velocity, and the spatial distribution of the downstream nappe wind. The factors mentioned above are introduced to formulate the empirical model. The rule obtained from the numerical analyses is compared with the results of the physical model test and the prototype observations, which yields a solid agreement. The numerical results indicate that the powerhouse is no longer in the heavy rain area when adopting the flip bucket whose curved surface is attached to the left wall. The rainfall intensity of the powerhouse is significantly weaker than that of other types under the designed condition, so we choose it as the recommended bucket type. Meanwhile, we compare the rainfall intensity distribution of the original bucket and the recommended bucket under different discharge which rates ranging from 150.71 to 1094.9 m3/s. It is found that the powerhouse and the owner camp are no longer in the heavy rain area under all of the working conditions. Finally, it is shown that the atomization influence during the flood discharge can be reduced by using the recommended bucket.
机译：泄洪雾化是一个严峻的挑战，威胁着坝区周围居民的日常生活以及水利工程的安全。本研究旨在提高随机飞溅模型的预测精度。进行了四种类型的翻转铲斗的物理模型测试，以获得水射流撞击的外边缘的水力参数，飞溅的液滴直径与其相应速度的关系以及下游的推覆风的空间分布。介绍了上述因素以建立经验模型。将从数值分析中获得的规则与物理模型测试和原型观察的结果进行比较，从而得出了一致的结论。数值结果表明，采用弧形曲面附着在左墙的翻转铲斗时，动力室不再处于大雨区域。在设计条件下，发电厂的降雨强度明显弱于其他类型的降雨强度，因此我们选择它作为推荐的铲斗类型。同时，比较了不同出水率（150.71〜1094.9 m 3 / s）下原始水桶和推荐水桶的降雨强度分布。发现在所有工作条件下，发电站和所有者营地都不再位于大雨区域。最后，结果表明，使用推荐的铲斗可以减少泄洪期间的雾化影响。

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