Performance of the Vectrino Profiler at the sediment–water interface

Performance of the Vectrino Profiler at the sediment–water interface
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Vectrino 剖面仪在沉积物-水界面处的性能

DOI:
10.1080/00221686.2016.1275049
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发表时间:
2017
影响因子:
2.3
通讯作者:
Anlanger
Anlanger
中科院分区:
工程技术3区
文献类型:
--
作者:
Anlanger

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Vectrino剖面仪由于其高时空分辨率和速度剖面范围,越来越被认为是表征近床速度和湍流的有前途的仪器。然而,其在床附近(<10 mm)的测量性能没有很好的记录。本研究报告的平均速度,湍流动能,功率谱密度以上各种床层材料之间的Vectrino Profiler和粒子图像测速在实验室水槽的比较。我们的分析表明,床的干扰产生不利影响的测量接近1.7-5毫米以上的床,这取决于床的材料。我们提供了一个标准来识别干扰区域的垂直范围。在干扰区域之外,Vectrino Profiler和粒子图像测速仪之间的最佳一致性出现在Profiler的最佳点附近,在该点处观察到的平均速度差异<6%,湍流动能差异<10%。
The Vectrino Profiler is increasingly recognized as a promising instrument for characterizing near-bed velocities and turbulence due to its high spatio-temporal resolution and velocity profiling range. However, its measurement performance in the vicinity of the bed (<10 mm) is not well documented. This study reports on the comparisons of mean velocity, turbulent kinetic energy, and power spectral density above various bed materials between the Vectrino Profiler and particle image velocimetry in a laboratory flume. Our analyses demonstrate that the bed interference adversely influences the measurements as close as 1.7–5 mm above the bed, depending on the bed material. We provide a criterion to identify the vertical extent of the interference region. Outside of the interference region, best agreement between the Vectrino Profiler and particle image velocimetry was found around the sweet-spot of the profiler where the observed differences were <6% for mean velocities and <10% for turbulent kinetic energy.
DOI: --
发表时间: 2007
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