Can we improve the non-intrusive characterization of high-velocity air–water flows? Application of LIDAR technology to stepped spillways
Can we improve the non-intrusive characterization of high-velocity air–water flows? Application of LIDAR technology to stepped spillways
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DOI：
10.1080/00221686.2019.1581670
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发表时间：
2020-02
影响因子：
2.3
通讯作者：
M. Kramer;H. Chanson;S. Felder
中科院分区：
文献类型：
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作者：
M. Kramer;H. Chanson;S. Felder
摘要高速空气-水流动特性对包括梯级溢洪道在内的水工构筑物的设计至关重要。最近的实验进展表明，激光雷达技术可以在高空间和时间分辨率下提供充分充气流动的自由表面特征。本文介绍了激光雷达在实验室阶梯溢洪道加气水流中的应用。虽然激光雷达不适用于清澈水流和快速变化的水流区域，但该结果对泄洪道下游端充气水流内的气水表面特征提供了最详细的空间描述。与特征空气-水流动高度和内部流动参数吻合良好。通过相关分析获得了积分时间尺度，并与以前的测量结果进行了比较。目前的研究强调了激光雷达在高速空气-水流动中的适用性，以及未来在原型规模上应用于水力现象的潜力。
ABSTRACT The characterization of high-velocity air–water flows is crucial for the design of hydraulic structures including stepped spillways. Recent experimental advances have shown that LIDAR technology can provide free-surface features in fully aerated flows at high spatial and temporal resolution. This manuscript presents the application of LIDAR to the aerated flows down a laboratory stepped spillway. While the LIDAR was not applicable in the clear water flow and the rapidly varied flow region, the results provided the most detailed spatial description of air–water surface features within the fully aerated flow towards the downstream end of the spillway. Good agreement was observed with characteristic air–water flow elevations and internal flow parameters. Integral time scales were obtained by means of correlation analyses and compared favourably with previous measurements. The present study highlighted the suitability of LIDAR in high-velocity air–water flows and the potential for future applications to hydraulic phenomena at prototype scale.