Measurement of Turbulence with Acoustic Doppler Current Profilers -- Sources of Error and Laboratory Results
Measurement of Turbulence with Acoustic Doppler Current Profilers -- Sources of Error and Laboratory Results
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使用声学多普勒电流剖面仪测量湍流 - 误差来源和实验室结果
DOI：
10.1061/40655(2002)55
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发表时间：
2002
影响因子：
0.5
通讯作者：
C. Rehmann
中科院分区：
文献类型：
--
作者：
E. Nystrom;K. Oberg;C. Rehmann
声学多普勒海流剖面仪(ADCP)可以相对容易地在较短的时间内提供大空间范围的数据，为测量地表水湍流提供了一种很有前途的方法。利用ADCP进行湍流测量的一些潜在误差来源包括：多普勒频移测量不准确，时间和空间测量分辨率不高，以及在不同位置测量的一维速度解析的多维速度不准确。利用两个脉冲相干ADCP在0.87米水中进行的平均速度和湍流统计的实验室测量结果，说明了ADCP湍流测量中的几个固有误差来源。结果表明，处理算法和光束配置对湍流测量有重要影响。ADCP可以提供对许多湍流参数的合理估计；然而，与标准测量技术相比，使用商用ADCP进行的湍流测量的准确性往往较差。
Acoustic Doppler current profilers (ADCPs) provide a promising method for measuring surface-water turbulence because they can provide data from a large spatial range in a relatively short time with relative ease. Some potential sources of errors in turbulence measurements made with ADCPs include inaccuracy of Doppler-shift measurements, poor temporal and spatial measurement resolution, and inaccuracy of multi-dimensional velocities resolved from one-dimensional velocities measured at separate locations. Results from laboratory measurements of mean velocity and turbulence statistics made with two pulse-coherent ADCPs in 0.87 meters of water are used to illustrate several of inherent sources of error in ADCP turbulence measurements. Results show that processing algorithms and beam configurations have important effects on turbulence measurements. ADCPs can provide reasonable estimates of many turbulence parameters; however, the accuracy of turbulence measurements made with commercially available ADCPs is often poor in comparison to standard measurement techniques.